Taxa Listing
Every plant at the JC Raulston Arboretum is listed below. Use the search feature in Our Plants to narrow down the results or download a pdf list from our Current Plantings publication web page.
- Aucuba japonica 'Suruga Benten'
- Abelia
- Abelia chinensis – Chinese abelia
- Abelia ×grandiflora 'Abelops' – Sunshine Daydream glossy abelia
- Abelia ×grandiflora 'Canyon Creek' – golden glossy abelia
- Abelia ×grandiflora 'Conti' – Confetti variegated glossy abelia
- Abelia ×grandiflora 'Francis Mason' – glossy abelia
- Abelia ×grandiflora 'Frosty' – glossy abelia
- Abelia ×grandiflora 'Goldenglossy' – Gold Dust glossy abelia
- Abelia ×grandiflora 'Hopleys' – Miss Lemon variegated glossy abelia
- Abelia ×grandiflora 'Kaleidoscope' – glossy abelia
- Abelia ×grandiflora 'Keiser' – Ruby Anniversary glossy abelia
- Abelia ×grandiflora 'Mardi Gras' – variegated glossy abelia
- Abelia ×grandiflora 'Margarita' – Twist of Orange variegated glossy abelia
- Abelia ×grandiflora 'Minduo1' – Sunny Anniversary glossy abelia
- Abelia ×grandiflora 'Radiance' – glossy abelia
- Abelia ×grandiflora 'Wev02' – Bella Donna variegated glossy abelia
- Abelia 'Lynn' – Pinky Bells large flowered dwarf abelia
- Abelia parvifolia 'Saxon Gold' – Schumann abelia
- Abelia 'SRPabeper' (Peach Perfection) – glossy abelia
- Abelia 'X10-9002-23' – abelia
- Abelia 'X10-9028-7'
- Abelia 'X10-9044-1'
- Abelmoschus manihot – sweet hibiscus
- Abies cephalonica 'Meyer's Dwarf' – dwarf Greek fir
- Abies concolor 'Blue Cloak' – concolor fir
- Abies fargesii – Farges' fir
- Abies firma – Momi fir
- Abies guatemalensis – Guatemalan fir
- Abies holophylla – Manchurian fir
- Abies koreana – Korean fir
- Abies koreana 'Green Carpet' – dwarf Korean fir
- Abies koreana 'Silberlocke' – Korean fir
- Abies koreana 'Tundra' – Korean fir
- Abies koreana 'Wellenseind' – Korean fir
- Abies pinsapo 'Aurea' – golden Spanish fir
- Abutilon 'Bartley Schwarz' – flowering maple
- Abutilon 'Canary Bird' – flowering maple
- Abutilon 'Marion Stewart' – flowering maple
- Abutilon megapotamicum – Brazillian bellflower
- Abutilon megapotamicum 'Little Imp' – Brazillian bellflower
- Abutilon megapotamicum 'Red Heart' – Brazillian bellflower
- Abutilon megapotamicum 'Ruffles' – flowering maple
- Abutilon 'Orange Hot Lava' – flowering maple
- Abutilon 'Sink Pink' – flowering maple
- Abutilon 'Traffic Island' – flowering maple
- Abutilon 'Voodoo' – flowering maple
- Abutilon 'Windcliff Silver Pink' – flowering maple
- Abutilon 'Windcliff White' – flowering maple
- Acacia menzelii – Menzel's Wattle
- Acalypha pendula – creeping chenille plant
- Acantholimon – Prickly thrift
- Acantholimon (giant silver cushion)
- Acantholimon halophilum
- Acanthus dioscoridis var. perringii – Syrian bear's breech
- Acanthus 'Holland Days' – bear's breech
- Acanthus 'Morwiho' – Mornings Candle bear's breech
- Acanthus 'Summer Beauty' – bear's breech
- Acanthus 'Wofford Rhubarb' – bear's breech
- Acca sellowiana 'Kawatiri' – pineapple guava
- Acca sellowiana 'Nazemetz' – pineapple guava
- Acca sellowiana 'NCSU Hardy' – pineapple guava
- Acca sellowiana 'Opal Star' – pineapple guava
- Acer – maple
- Acer 'Asian Queen' – smooth Japanese maple
- Acer buergerianum – trident maple
- Acer buergerianum 'Bling-bling' – trident maple
- Acer buergerianum var. formosanum – Taiwan trident maple
- Acer buergerianum 'Michael Steinhardt' – golden trident maple
- Acer buergerianum 'Mino yatsubusa' – dwarf trident maple
- Acer buergerianum 'Miyadono' – dwarf trident maple
- Acer buergerianum 'Miyasama' – prince's maple
- Acer buergerianum 'Naruto' – twisted-leaf trident maple
- Acer buergerianum var. ningpoense – Ningpo trident maple
- Acer campbellii 'Boney Fingers' – Campbell's maple
- Acer campbellii subsp. flabellatum – Campbell's Maple
- Acer campbellii subsp. sinense – Campbell's maple
- Acer campestre 'Carnival' – variegated field maple
- Acer campestre 'Nanum' – compact hedge maple
- Acer cappadocicum subsp. cappadocicum – Coliseum maple
- Acer cappadocicum subsp. cappadocicum 'Aureum' – golden Coliseum maple
- Acer caudatifolium – Kawakami maple
- Acer ceriferum
- Acer circinatum 'HSI2' – Three Cheers vine maple
- Acer cissifolium – ivy-leaf maple
- Acer aff. davidii
- Acer elegantulum – elegant maple
- Acer elegantulum × A. palmatum 'Johnnie's Giant' – Japanese maple
- Acer (evergreen)
- Acer fabri – Faber evergreen maple
- Acer aff. fabri – Faber maple
- Acer ×freemanii 'Celzam' – Celebration Freeman maple
- Acer ×freemanii 'JFS-KW78' – Armstrong Gold Freeman maple
- Acer 'Girard's Selection' – cinnamon-bark maple
- Acer grandidentatum 'Hipazam' – Highland Park bigtooth maple
- Acer griseum – paperbark maple
- Acer griseum × A. pseudoplatanus
- Acer griseum 'JFS KW8AGRI' – Fireburst paperbark maple
- Acer henryi – Henry's maple
- Acer hyrcanum – Balkan maple
- Acer japonicum 'Aconitifolium' – cut-leaf full moon maple
- Acer japonicum 'Green Cascade' – weeping full moon maple
- Acer japonicum 'Ô Isami' – full moon maple
- Acer 'JFS-KW249' – Ruby Sunset maple
- Acer laevigatum – smooth maple
- Acer laevigatum 'Hóng Lóng' – red dragon smooth maple
- Acer leucoderme 'Confederate Ghost' – variegated chalk maple
- Acer longipes
- Acer miyabei – Miyabe maple
- Acer monspessulanum – Montpelier maple
- Acer negundo 'Flamingo' – variegated boxelder
- Acer negundo 'Kelly's Gold' – golden boxelder
- Acer negundo 'Winter Lightning' – yellow-twig boxelder
- Acer oblongum – flying moth maple
- Acer oliverianum 'Nakahara Beni' – Oliver maple
- Acer palmatum – Japanese maple
- Acer palmatum × A. circinatum – hybrid maple
- Acer palmatum 'Aka Kawa Hime' – coral-bark Japanese maple
- Acer palmatum 'Alan's Gold' – Japanese maple
- Acer palmatum 'Ao kanzashi' – variegated Japanese maple
- Acer palmatum 'Aoyagi' – green-bark Japanese maple
- Acer palmatum 'Arakawa' – rough-bark Japanese maple
- Acer palmatum 'Asahi Zuru' – variegated Japanese maple
- Acer palmatum 'Beni fushigi' – red lace-leaf Japanese maple
- Acer palmatum 'Beni Hoshi' – Japanese maple
- Acer palmatum 'Beni komachi' – dwarf red-leaf Japanese maple
- Acer palmatum 'Beni ôtake' – red bamboo Japanese maple
- Acer palmatum 'Beni schichihenge' – variegated pink-leaf Japanese maple
- Acer palmatum 'Beni shi en' – variegated Japanese maple
- Acer palmatum 'Bihou' – gold-bark Japanese maple
- Acer palmatum 'Black Lace' – Japanese maple
- Acer palmatum 'Bloodgood' – purple-leaf Japanese maple
- Acer palmatum 'Burgundy Lace' – red-leaf Japanese maple
- Acer palmatum 'Calico' – Japanese maple
- Acer palmatum 'Chishio Improved' – Japanese maple
- Acer palmatum 'Corallinum' – chameleon Japanese maple
- Acer palmatum 'Creech's Miyabei' – Japanese maple
- Acer palmatum 'Crimson Queen' – red lace-leaf Japanese maple
- Acer palmatum Dissectum Atropurpureum Group – red lace-leaf Japanese maple
- Acer palmatum Dissectum Viride Group – green lace-leaf Japanese maple
- Acer palmatum 'Dixie Delight' – Japanese maple
- Acer palmatum 'E.P.' – purple-leaf Japanese maple
- Acer palmatum 'Emerald Lace' – lace-leaf Japanese maple
- Acer palmatum 'Enkan' – dwarf red Japanese maple
- Acer palmatum 'Frilly Willy' – Japanese maple
- Acer palmatum (Fujinami clone) – Japanese maple
- Acer palmatum 'Geisha Gone Wild' – variegated Japanese maple
- Acer palmatum 'Glowing Embers' – Japanese maple
- Acer palmatum 'Gold Digger' – coral-bark Japenese maple
- Acer palmatum 'Golden Falls' – Japanese maple
- Acer palmatum 'Goshiki kotohime' – variegated Japanese maple
- Acer palmatum 'Green Hornet' – green lace-leaf Japanese maple
- Acer palmatum 'Green Star' – green-leaf Japanese maple
- Acer palmatum 'Green Trompenburg' – Japanese maple
- Acer palmatum 'Hagoromo' – angel's dress Japanese maple
- Acer palmatum 'Hana Matoi' – variegated dissectum Japanese maple
- Acer palmatum 'Hefner's Red' – Japanese maple
- Acer palmatum 'Higasa yama' – variegated Japanese maple
- Acer palmatum 'Hime Shojo' – Japanese maple
- Acer palmatum 'Hino Tori Nishiki' – Japanese maple
- Acer palmatum 'Hôgyoku' – green-leaf Japanese maple
- Acer palmatum 'Hubb's Red Willow' – purple narrowleaf Japanese maple
- Acer palmatum 'Ikandi' – variegated Japanese maple
- Acer palmatum 'Jeannie's Dream' – Japanese maple
- Acer palmatum 'Jirô shidare' – green-leaf Japanese maple
- Acer palmatum 'Kamagata' – dwarf Japanese maple
- Acer palmatum 'Kashima yatsubusa' – dwarf Japanese maple
- Acer palmatum 'Ki Hachijo' – Japanese maple
- Acer palmatum 'Kiri Nishiki' – Japanese maple
- Acer palmatum 'Kiyohime' – spreading Japanese maple
- Acer palmatum 'Kiyohime Yatsubusa' – dwarf Japanese maple
- Acer palmatum 'Koto ito komachi' – dwarf threadleaf Japanese maple
- Acer palmatum 'Koyamadari Nishiki' – Japanese maple
- Acer palmatum 'Krazy Krinkle' – Japanese maple
- Acer palmatum 'Kuro Hime' – dwarf Japanese maple
- Acer palmatum 'Lemon Chiffon' – Japanese maple
- Acer palmatum 'Linearilobum' – green narrowleaf Japanese maple
- Acer palmatum 'Mama' – tatter-leaf Japanese maple
- Acer palmatum 'Manyo-no-sato' – variegated Japanese maple
- Acer palmatum 'Margaret Bee' – purple-leaf Japanese maple
- Acer palmatum 'Mikawa Yatsubusa' – dwarf Japanese maple
- Acer palmatum 'Milky Way' – agina japanese maple
- Acer palmatum 'Moonfire' – purple-leaf Japanese maple
- Acer palmatum 'Nishiki gawa' – pine-bark Japanese maple
- Acer palmatum 'Nishiki Momiji' – green-leaf Japanese maple
- Acer palmatum 'Nuresagi' – purple-leaf Japanese maple
- Acer palmatum 'O jishi' – dwarf Japanese maple
- Acer palmatum 'Ô kagami' – Japanese maple
- Acer palmatum 'Okukuji Nishiki' – variegated Japanese maple
- Acer palmatum 'Okushimo' – tube-leaf Japanese maple
- Acer palmatum 'Omure yama' – green-leaf Japanese maple
- Acer palmatum 'Orange Hagoromo' – Japanese maple
- Acer palmatum 'Orangeola' – red lace-leaf Japanese maple
- Acer palmatum 'Oregon Sunset' – red lace-leaf Japanese maple
- Acer palmatum 'Oridono Nishiki' – variegated chameleon Japanese maple
- Acer palmatum 'Orion' – dwarf Japanese maple
- Acer palmatum 'Ornatum' – red lace-leaf Japanese maple
- Acer palmatum 'Ōsakasuki' – green-leaf Japanese maple
- Acer palmatum 'Peaches and Cream' – reticulated Japanese maple
- Acer palmatum 'Pendulum Julian' – red lace-leaf Japanese maple
- Acer palmatum 'Peve Starfish' – Japanese maple
- Acer palmatum 'Pung Kil' – Japanese maple
- Acer palmatum 'Purple Ghost' – purple-leaf Japanese maple
- Acer palmatum 'Raraflora' – lace-leaf Japanese maple
- Acer palmatum 'Red Dragon' – red lace-leaf Japanese maple
- Acer palmatum 'Red Filigree Lace' – red lace-leaf Japanese maple
- Acer palmatum 'Red Pygmy' – red narrowleaf Japanese maple
- Acer palmatum 'Red Select' – Japanese maple
- Acer palmatum 'Rhode Island Red' – red-leaf Japanese maple
- Acer palmatum 'Roja Yatsubusa' – Japanese maple
- Acer palmatum 'Roxie' – Japanese maple
- Acer palmatum 'Ruby Stars' – dwarf red-leaf Japanese maple
- Acer palmatum 'Ryugu' – variegated Japanese maple
- Acer palmatum 'Ryusen' – weeping Japanese maple
- Acer palmatum 'Saiho' – dwarf Japanese maple
- Acer palmatum 'Sango kaku' – Japanese maple
- Acer palmatum 'Satsuki Beni' – Japanese maple
- Acer palmatum 'Scarlet Princess' – dissectum Japanese maple
- Acer palmatum 'Seigai' – dwarf Japanese maple
- Acer palmatum 'Seiryu' – green dragon Japanese maple
- Acer palmatum 'Seiun kaku' – dwarf Japanese maple
- Acer palmatum 'Sekka Yatsubusa' – green-leaf Japanese maple
- Acer palmatum 'Shaina' – dwarf purple-leaf Japanese maple
- Acer palmatum 'Sherwood Flame' – purple-leaf Japanese maple
- Acer palmatum 'Shigitatsu sawa' – variegated Japanese maple
- Acer palmatum 'Shishi Yatsubusa' – dwarf Japanese maple
- Acer palmatum 'Shishigashira' – lion's-mane Japanese maple
- Acer palmatum 'Spring Delight' – dwarf Japanese maple
- Acer palmatum 'Sumi Nagashi' – purple-leaf Japanese maple
- Acer palmatum 'Summer Gold' – gold-leaf Japanese maple
- Acer palmatum 'Syuka' – Japanese maple
- Acer palmatum 'Tama Hime' – dwarf Japanese maple
- Acer palmatum 'Tamuke yama' – red lace-leaf Japanese maple
- Acer palmatum 'Trompenburg' – purple leaf Japanese maple
- Acer palmatum 'Tsukasa Silhouette' – columnar Japanese maple
- Acer palmatum 'Ueno Homare' – Japanese maple
- Acer palmatum 'Ukigumo' – variegated Japanese maple
- Acer palmatum 'Wabito' – variable-leaf Japanese maple
- Acer palmatum 'Waterfall' – green lace-leaf Japanese maple
- Acer palmatum 'Wildfire' – Japanese maple
- Acer palmatum 'Wilson's Pink Dwarf' – Japanese maple
- Acer palmatum 'Wou Nishiki' – Japanese maple
- Acer palmatum 'Yubae' – variegated purple-leaf Japanese maple
- Acer pauciflorum – maple
- Acer pentaphyllum (NSW genetics)
- Acer pictum subsp. mono – painted maple
- Acer pictum 'Usugumo' – variegated painted maple
- Acer pilosum var. stenolobum – stencilled maple
- Acer platanoides 'Ruby's Joy' – Norway maple
- Acer pseudoplatanus 'Simon-Louis Frères' – variegated sycamore maple
- Acer pseudosieboldianum × A. palmatum – hybrid Japanese maple
- Acer pseudosieboldianum var. microsieboldianum – Korean maple
- Acer pseudosieboldianum subsp. takesimense – Ulleung-Do maple
- Acer pubinerve – Chinese maple
- Acer robustum – maple
- Acer rubrum 'Candy Ice'
- Acer rubrum 'New World' – red maple
- Acer rubrum 'Snow Fire' – tricolor red maple
- Acer saccharinum 'Born's Gracious' – cut-leaf silver maple
- Acer saccharinum 'JFS H1'
- Acer saccharum 'Barrett Cole' – Apollo sugar maple
- Acer saccharum 'Flax Mill Majesty' – sugar maple
- Acer saccharum 'Millane Dwarf' – sugar maple
- Acer saccharum 'Reba' – Belle Tower sugar maple
- Acer saccharum 'Whit XLIX' – Powder Keg sugar maple
- Acer sempervirens – Cretan maple
- Acer serrulatum – Taiwan maple
- Acer shirasawanum 'Jordan' – golden full moon maple
- Acer shirasawanum 'Munn 001' – Moonrise full moon maple
- Acer shirasawanum 'Palmatifolium' – Shirasawa maple
- Acer shirasawanum var. tenuifolium 'Keikan Zan' – fullmoon maple
- Acer shirasawanum 'Yasemin' – full moon maple
- Acer sieboldianum 'Seki-no-kegon' – weeping Siebold's maple
- Acer sikkimense – Sikkim Maple
- Acer skutchii – Mexican mountain sugar maple
- Acer skutchii 'Tequila Sunrise' – Mexican mountain sugar maple
- Acer stachyophyllum subsp. betulifolium – birch-leaf maple
- Acer tataricum subsp. semenovii – Turkestan shrub maple
- Acer tonkinense – Tonkin maple
- Acer truncatum – Shantung maple
- Acer truncatum 'Golden Dragon' – Shantung maple
- Acer tschonoskii – butterfly maple
- Acer ×waxmanii – hybrid maple
- Acer ×waxmanii (Selection No. 18) – Waxman's maple
- Achillea asplenifolia – yarrow
- Achillea millefolium 'FLORACHYE2' – Milly Rock Yellow Terracotta Improved yarrow
- Achillea millefolium (Montrose rose form) – common yarrow
- Achillea millefolium 'Strawberry Seduction' – yarrow
- Achillea 'Sassy Summer Lemon' – yarrow
- Achillea 'Sassy Summer Taffy' – yarrow
- Acis autumnalis – autumn snowflake
- Aconitum ×cammarum 'Eleanor' – bicolor monkshood
- Aconitum carmichaelii [Arendsii Group] 'Arendsii' – monkshood
- Aconitum fischeri – monkshood
- Acorus gramineus 'Chabosekisho' – golden sweet flag
- Acorus gramineus 'Licorice' – golden sweet flag
- Acorus gramineus 'Minimus Aureus' – golden sweet flag
- Acorus gramineus 'Oborozuki' – variegated sweet flag
- Acorus gramineus 'Ogon' – golden sweet flag
- Actinidia arguta 'Dumbarton Oaks'
- Actinidia arguta 'Ken's Red'
- Actinidia arguta (variegated) – variegated hardy kiwi
- Actinidia chinensis var. setosa – hardy kiwi
- Actinidia chinensis 'Vincent' (female) – kiwi fruit
- Adenophora – bellflower
- Adenophora nikoensis
- Adiantum aleuticum 'Imbricatum' – western maidenhair fern
- Adiantum capillus-veneris 'Alabama Lace' – maidenhair fern
- Adiantum capillus-veneris 'Bermuda Run' – maidenhair fern
- Adiantum capillus-veneris 'Falling Waters' – maidenhair fern
- Adiantum capillus-veneris 'Fan Dance' – maidenhair fern
- Adiantum caudatum – walking maidenhair fern
- Adiantum 'Golden Michael' – maidenhair fern
- Adiantum ×mairisii – hybrid maidenhair fern
- Adina rubella 'Purple Flower' – Chinese buttonbush
- Adinandra glischroloma
- Adinandra millettii
- Adinandra millettii (ABGG red purple clone) – adinandra
- Aeschynanthus buxifolius – box-leaf lipstick plant
- Aesculus 'Bergeson' – Prairie Torch buckeye
- Aesculus californica – California buckeye
- Aesculus californica 'Canyon Pink' – California buckeye
- Aesculus ×carnea 'Rosea' – red horse chestnut
- Aesculus ×carnea 'Variegata' – variegated red horse chestnut
- Aesculus ×carnea (variegated)
- Aesculus chinensis – Chinese horse chestnut
- Aesculus chinensis var. wilsonii – Wilson's horse chestnut
- Aesculus indica 'Sydney Pearce' – pink Indian horse chestnut
- Aesculus ×mutabilis 'Induta' – hybrid buckeye
- Aesculus parviflora – bottlebrush buckeye
- Aesculus parviflora 'Rogers' – bottlebrush buckeye
- Aesculus parviflora f. serotina – late bottlebrush buckeye
- Aesculus pavia 'Fishtail' – red buckeye
- Aesculus pavia var. pavia – red buckeye
- Aesculus pavia (peach flower)
- Aesculus pavia 'Red Baron' – red buckeye
- Aesculus pavia 'Splendens' – scarlet buckeye
- Aesculus turbinata 'Marble Chip' – variegated horse chestnut
- Aesculus ×woerlitzensis – hybrid buckeye
- Aethionema armenum
- Aethionema saxatile – stonecress
- Aethionema subulatum
- Agapanthus 'Blue Yonder' – Blue Yonder lily of the Nile
- Agapanthus 'Early Blue'
- Agapanthus 'Galaxy White' – lily of the nile
- Agapanthus praecox subsp. orientalis 'Flore Pleno'
- Agapanthus 'Stevie's Wonder' – lily of the Nile
- Agapanthus 'Summer Skies' – lily-of-the-Nile
- Agapanthus 'White Heaven'
- Agarista populifolia – Florida leucothoe
- Agarista populifolia 'Taylors Treasure' – Leprechaun compact Florida leucothoe
- Agastache 'Crazy Fortune'
- Agastache 'Kudos Coral'
- Agastache mexicana 'Balsumlem' (Summerlong Lemon) – Mexican giant hyssop
- Agastache mexicana 'Balsumlilac' – Summerlong Lilac Mexican giant hyssop
- Agathis robusta – Queensland kauri
- Agave asperrima – rough century plant
- Agave 'Bluebell Giants' – century plant
- Agave bracteosa 'Octopussy' – bracted century plant
- Agave bracteosa 'Squidget' – dwarf bracted century plant
- Agave 'Crazy Horse' – century plant
- Agave cryptica – century plant
- Agave 'Durango Fandango' – century plant
- Agave flexispina – century plant
- Agave 'Funky Toes' – century plant
- Agave ×glomeruliflora – Chisos mountains century plant
- Agave gracilipes – slimfoot century plant
- Agave 'Huasteca Giant' – century plant
- Agave lechuguilla – shin dagger
- Agave lophantha – thorn-crested century plant
- Agave lophantha × A. salmiana var. ferox 'Logan Calhoun' – hybrid century plant
- Agave lophantha 'La Bufa Baby' – thorn-crested century plant
- Agave lophantha 'Miniskirt' – thorn-crested century plant
- Agave lophantha 'Quadricolor' – thorn-crested century plant
- Agave 'Mr. Ripple' – hybrid century plant
- Agave multifilifera 'Basaseachic Falls' – chahuiqui
- Agave ocahui var. ocahui – ocahui
- Agave ovatifolia – whale's tongue agave
- Agave ovatifolia 'Frosty Blue' – whale's tongue agave
- Agave pablocarrilloi 'Baby Booties' – gypsum century plant
- Agave palmeri 'Cutty Shark' – Palmer's century plant
- Agave parryi var. huachucensis – Huachuca century plant
- Agave parryi var. huachucensis 'Excelsior' – variegated Huachuca century plant
- Agave parryi 'J.C. Raulston' – century plant
- Agave parryi subsp. neomexicana 'Culberson Giant' – New Mexico century plant
- Agave parviflora – small-flowered century plant
- Agave 'Queen's Whale Come' – hybrid century plant
- Agave salmiana – century plant
- Agave salmiana var. ferox 'Bellville' – giant century plant
- Agave salmiana var. ferox 'Logan Calhoun' – giant century plant
- Agave striata – narrow-leaved century plant
- Agave striata var. striata – narrow-leaved century plant
- Agave 'Twisted Tongue' – century plant
- Agave utahensis subsp. kaibabensis – Utah century plant
- Agave victoriae-reginae – Queen Victoria century plant
- Agave victoriae-reginae 'Bustamonte' – Queen Victoria century plant
- Agave victoriae-reginae 'Porcupine' – Queen Victoria agave
- Ageratina ligustrina – privet-leaved snakeroot
- Ailanthus giraldii – Giraldi's tree of heaven
- Ajania × Chrysanthemum – garden chrysanthemum
- Ajania pacifica – silver and gold chrysanthemum
- Ajuga 'Cordial Canary' – Feathered Friends carpet bugle
- Ajuga 'Fierce Falcon' – Feathered Friends carpet bugle
- Ajuga genevensis – blue bugle
- Ajuga incisa 'Bikun' – carpet bugle
- Ajuga incisa 'Blue Enigma' – giant bugle
- Ajuga 'Parrot Paradise' – Feathered Friends carpet bugle
- Ajuga pyramidalis 'Metallica Crispa' – pyramid bugle
- Ajuga reptans – carpet bugle
- Ajuga reptans 'Assaj1' – Princess Elsa carpet bugle
- Ajuga reptans 'Binblasca' – Black Scallop black carpet bugle
- Ajuga reptans 'Dixie Chip' – tricolor carpet bugle
- Ajuga reptans 'Planet Zork' – carpet bugle
- Ajuga 'Tropical Toucan' – Feathered Friends carpet bugle
- Ajuga 'Valfredda' – Chocolate Chip carpet bugle
- Akebia longeracemosa – chocolate vine
- Akebia quinata (silver overlay) – variegated chocolate vine
- Akebia trifoliata – three-finger akebia
- Akebia trifoliata (variegated) – variegated three-finger akebia
- Alangium chinense
- Alangium platanifolium – alangium
- Albizia coreana – Korean mimosa
- Albizia julibrissin (ex. 'Summer Chocolate') – mimosa
- Albizia julibrissin 'Fukuba Shidare' – weeping mimosa
- Albuca flaccida
- Albuca shawii
- Allium – flowering onion
- Allium akaka
- Allium altyncolicum
- Allium 'Ambassador'
- Allium amethystinum – drumstick allium
- Allium ampeloprasum var. ampeloprasum – great-head garlic
- Allium atropurpureum
- Allium 'Bubble Bath' – ornamental onion
- Allium callimischon subsp. haemostictum
- Allium canadense var. florosum 'White Flag' – meadow garlic
- Allium carolinianum
- Allium cepa 'Medusa' – ornamental onion
- Allium cristophii – star of Persia
- Allium cyrilli
- Allium 'Firmament'
- Allium flavum
- Allium giganteum
- Allium jesdianum 'Akbulak'
- Allium jesdianum 'Early Emperor'
- Allium lusitanicum – mountain garlic
- Allium 'Miami' – ornamental onion
- Allium 'Millennium' – ornamental onion
- Allium moly 'Jeannine'
- Allium nevskianum
- Allium nutans
- Allium nutans 'Pam Harper' – steppe onion
- Allium 'Pink Feathers' – ornamental onion
- Allium 'Pink Planet'
- Allium ×proliferum – Egyptian walking onion
- Allium pskemense
- Allium schubertii
- Allium senescens 'Glauca'
- Allium 'Serendipity' – ornamental onion
- Allium sphaerocephalon – drumstick leek
- Allium stipitatum 'Violet Beauty'
- Allium 'Sugar Melt' – ornamental onion
- Allium 'Summer Drummer'
- Allium 'Summer Pink' – ornamental onion
- Allium texanum – Texas onioni
- Allium thunbergii
- Allium triquetrum – three-cornered leek
- Allium tuberosum – garlic chives
- Allium virgunculae var. kiiense
- Alocasia 'Architexture' – elephant ear
- Alocasia cucullata 'Moon Landing' – variegated hooded dwarf elephant ear
- Alocasia 'Mayan Mask' – elephant ear
- Alocasia odora
- Alocasia 'Portodora' – hybrid upright elephant ear
- Alocasia 'Regal Shields' – upright elephant ear
- Aloe aristata
- Aloe maculata 'Fort Worth' – soap aloe
- Aloysia gratissima – whitebrush
- Alpinia japonica – ginger lily
- Alpinia japonica 'Extra Spicy' – ginger lily
- Alpinia japonica 'Green Waves' – ginger lily
- Alpinia koshunensis – Taiwan shell ginger
- Alstroemeria 'Casablanca' – Peruvian lily
- Alstroemeria 'Freedom' – red Peruvian lily
- Alstroemeria ×hybrida 'PAS2052' – Jazze Rose Frost Peruvian lily
- Alstroemeria psittacina – parrot lily
- Alstroemeria 'Red Valley' – Peruvian lily
- Alstroemeria 'Sweet Laura' – golden Peruvian lily
- Alstroemeria 'Tesronto Imp'
- Alyssoides utriculata
- Alyssum aizoides
- Alyssum serpyllifolium – madwort
- Alyssum
- Alyssum wulfenianum
- ×Amarcrinum – amarcrinum
- ×Amarcrinum 'Born Free'
- ×Amarcrinum 'Lon Delkin'
- ×Amarcrinum memoria-corsii 'Howardii' – crinodonna
- Amaryllis belladonna
- Amelanchier canadensis 'Glenn Form' – Rainbow Pillar Canadian serviceberry
- Amelanchier ×grandiflora 'Silver Fountain' – serviceberry
- Amorpha georgiana – Georgia false indigo
- Amorphophallus henryi (narrow leaf form)
- Amorphophallus henryi (PDN No. 2)
- Amorphophallus kiusianus – devil's tongue
- Amorphophallus konjac – voodoo lily
- Amorphophallus konjac 'Flesh Gordon' – voodoo lily
- Amorphophallus konjac 'Leo Song' – voodoo lily
- Amorphophallus konjac 'Nightstick' – voodoo lily
- Amorphophallus konjac 'Shattered Glass' – voodoo lily
- Amorphophallus napalensis – Nepal voodoo lily
- Amorphophallus tonkinensis
- Amorphophallus yunnanensis
- Ampelaster carolinianus – climbing aster
- Amsonia 'Blue Ice' – hybrid bluestar
- Amsonia ciliata var. filifolia 'Georgia Pancake' – threadleaf bluestar
- Amsonia ciliata 'Halfway to Arkansas' – fringed bluestar
- Amsonia elliptica – Asian bluestar
- Amsonia hubrichtii – threadleaf bluestar
- Amsonia hubrichtii 'Butterscotch' – threadleaf bluestar
- Amsonia jonesii – Jones' bluestar
- Amsonia ludoviciana – Louisiana bluestar
- Amsonia rigida 'Black's Dwarf'
- Amsonia tabernaemontana 'Storm Cloud' – bluestar
- Anacampseros rufescens
- Andrachne colchica – Caucasian spurge
- Andropogon gerardii 'Lord Snowden's Big Blue' – big bluestem
- Andropogon gerardii 'Red October'
- Andropogon ternarius – splitbeard bluestem
- Andryala agardhii
- Anemone blanda 'Blue Shades' – windflower
- Anemone blanda 'Violet Star' – windflower
- Anemone coronaria 'Bride'
- Anemone coronaria 'Mister Fokker' – poppy anemone
- Anemone coronaria 'Mount Everest'
- Anemone coronaria [St. Brigid Group] 'Lord Lieutenant'
- Anemone coronaria 'Sylphide'
- Anemone coronaria 'The Governor'
- Anemone hupehensis 'Pretty Lady Maria' – windflower
- Angelica keiskei – Japanese angelica
- Angelica palustris – Marsh angelica
- Anisacanthus quadrifidus var. brevilobus – flame acanthus
- Anisacanthus quadrifidus var. wrightii – flame acanthus
- Anisacanthus quadrifidus var. wrightii (compact form) – compact flame acanthus
- Anisacanthus quadrifidus var. wrightii 'Pumpkin' – flame anisacanthus
- Anthericum liliago
- Anthyllis barba-jovis
- Antirrhinum australe
- Antirrhinum barrelieri – Spanish snapdragon
- Antirrhinum braun-blanquetii
- Aphananthe aspera – muku tree
- Aphyllanthes monspeliensis (LD Form)
- Apios americana
- Aquilegia – columbine
- Aquilegia atrata
- Aquilegia baluchistanica
- Aquilegia buergeriana (dwarf form) – dwarf columbine
- Aquilegia caerulea – Kirigami Light Blue & White bicolor columbine
- Aquilegia caerulea – Kirigami Red & White bicolor columbine
- Aquilegia fragrans – sweet-scented columbine
- Aquilegia grahamii
- Aquilegia nigricans – columbine
- Aquilegia oxysepala var. kansuensis – Oriental Columbine
- Aquilegia parviflora
- Aquilegia ×puryearana 'Bernice Ikins' – blazing stars columbine
- Aquilegia 'Roman Bronze'
- Aquilegia thalictrifolia
- Aquilegia transsilvanica – columbine
- Aquilegia vulgaris – columbine
- Aquilegia yabeana
- Arachniodes davalliaeformis – shiny bristle fern
- Arachniodes simplicior – east Indian holly fern
- Arachniodes standishii – upside-down fern
- Araiostegia pseudocystopteris – rabbit's foot fern
- Aralia cordata 'Sun King' – golden Japanese spikenard
- Araucaria araucana – monkey puzzle tree
- Araucaria araucana × A. angustifolia – hybrid monkey puzzle tree
- Arbutus unedo 'Compacta' – compact strawberry tree
- Arbutus unedo 'Oktoberfest' – strawberry tree
- Ardisia – coralberry
- Ardisia crenata – Adam's Curly coralberry
- Ardisia crenata 'Kotobuki' – coralberry
- Ardisia crenata (white-fruited) – coralberry
- Ardisia japonica 'Andre the Giant' – marlberry
- Ardisia japonica 'Angyo Pixie' – marlberry
- Ardisia japonica 'Chirimen' – dwarf marlberry
- Ardisia japonica 'El Luchador' – marlberry
- Ardisia japonica 'Hakuou' – White King variegated marlberry
- Ardisia japonica 'Hakuoukan' (White King Crown) – variegated marlberry
- Ardisia japonica 'Hanatei' – marlberry
- Ardisia japonica 'Izu Shinju' – marlberry
- Ardisia japonica (narrow leaf) – narrow leaf ardisia
- Argemone platyceras 'Busy Bee' – prickly poppy
- Arisaema candidissimum (White form) – white cobra lily
- Arisaema consanguineum – Himalayan cobra lily
- Arisaema aff. consanguineum – Himalayan cobra lily
- Arisaema 'Crossing Over' – Jack-in-the-Pulpit
- Arisaema dracontium – green dragon
- Arisaema aff. erubescens – cobra lily
- Arisaema fargesii – Farges's cobra lily
- Arisaema flavum – yellow cobra lily
- Arisaema ilanense – cobra lily
- Arisaema kiushianum – Kyushu cobra-lily
- Arisaema ringens – Japanese cobra lily
- Arisaema serratum – sawtooth cobra-lily
- Arisaema sikokianum (Graham Ray form, maybe variegated)
- Arisaema taiwanense – Formosan cobra lily
- Arisaema taiwanense (silver sheen) – Formosan cobra lily
- Arisaema thunbergii subsp. urashima – Urashima cobra lily
- Aristea anceps (Silver Hills form)
- Aristea ensifolia – blue stars
- Aristolochia clematitis
- Aristolochia fimbriata – hardy Dutchman's pipe
- Aronia melanocarpa 'UCONNAM012' – Ground Hug dwarf chokeberry
- Aronia melanocarpa 'UCONNAM165' – Low Scape Mound dwarf chokeberry
- Aronia ×prunifolia 'Wisley' – purple chokeberry
- Artemisia molinieri – Molinier's wormwood
- Artemisia 'Powis Castle' – Powis Castle artemisia
- Arum concinnatum
- Arum cyrenaicum × A. concinnatum
- Arum dioscoridis
- Arum italicum × Arum italicum subsp. neglectum 'Chameleon'
- Arum italicum 'Billy Hunt' – Italian arum
- Arum italicum 'Dapples' – Italian arum
- Arum italicum 'Gold Rush' – Italian arum
- Arum italicum 'Grandma' – Italian arum
- Arum italicum subsp. italicum – Italian arum
- Arum italicum 'Jet Black Wonder' – Italian arum
- Arum italicum 'Legs' – Italian arum
- Arum italicum (No. 1)
- Arum italicum (No. 2)
- Arum italicum 'Winter Angel'
- Arum pictum – autumn-flowering arum
- Arundo donax 'Golden Chain' – golden variegated giant reed
- Arundo donax 'Peppermint Stick' – white variegated giant reed
- Arundo formosana 'Variegata' – variegated Formosan reed grass
- Asarum – wild ginger
- Asarum albomaculatum – wild ginger
- Asarum arifolium 'Brunswick Stew' – arrowhead wild ginger
- Asarum asaroides – wild ginger
- Asarum asperum – wild ginger
- Asarum canadense – common wild- ginger
- Asarum caudigerum – wild ginger
- Asarum debile – wild ginger
- Asarum europaeum – European wild ginger
- Asarum fauriei var. takaoi – wild ginger
- Asarum fauriei var. takaoi 'Roundabout' – wild ginger
- Asarum hypogynum – little jugs
- Asarum ichangense – wild ginger
- Asarum kumageanum – Japanese wild ginger
- Asarum macranthum – wild ginger
- Asarum macranthum 'On the Mark' – wild ginger
- Asarum maximum – panda face wild ginger
- Asarum maximum 'Ling Ling' – panda face wild ginger
- Asarum nobilissimum 'Crown Royal' – wild ginger
- Asarum porphyronotum – glossy-leaf wild ginger
- Asarum porphyronotum var. atrovirens 'Internet' – wild ginger
- Asarum 'Setsu Getsu Ka' – wild ginger
- Asarum speciosum 'Woodlander's Select' – Alabama wild ginger
- Asarum splendens – Chinese wild ginger
- Asarum subglobosum – wild ginger
- Asarum aff. taipingshanianum – wild ginger
- Asarum yakusimense 'Sarlacc' – Yakushima wild ginger
- Asclepias curassavica 'Monarch's Banquet' – butterfly weed
- Asclepias curassavica 'Red Butterfly'
- Asclepias incarnata – swamp milkweed
- Asclepias incarnata (Large Marge) – swamp milkweed
- Asclepias incarnata (white flower) – swamp milkweed
- Asclepias perennis – white swamp milkweed
- Asclepias tuberosa – butterfly weed
- Asclepias tuberosa 'Hello Yellow' – butterfly weed
- Asclepias tuberosa subsp. tuberosa – butterfly weed
- Asimina triloba – pawpaw
- Asparagus acutifolius – wild asparagus
- Asparagus africanus – African asparagus
- Asparagus asparagoides – bridal creeper
- Asparagus brachyphyllus – wild asparagus
- Asparagus cochinchinensis – Chinese tuber asparagus
- Asparagus densiflorus 'Hardy Sprengeri'
- Asparagus denudatus – Sprenger's asparagus fern
- Asparagus maritimus
- Asparagus microraphis – asparagus fern
- Asparagus oligoclonos – ornamental asparagus
- Asparagus persicus – asparagus
- Asparagus schoberioides
- Asparagus setaceus
- Asparagus virgatus – broom fern
- Asparagus volubilis
- Asphodeline damascena
- Asphodeline lutea 'Italian Gold' – king's spear
- Asphodelus ramosus
- Aspidistra – cast iron plant
- Aspidistra attenuata – cast iron plant
- Aspidistra austroyunnanensis – cast iron plant
- Aspidistra basalis 'Green Jeans' – cast iron plant
- Aspidistra 'China Moon' – cast iron plant
- Aspidistra daibuensis 'Yushan Galaxy' – Yushan galaxy cast iron plant
- Aspidistra (dwarf streaked) – dwarf variegated cast iron plant
- Aspidistra ebianensis 'Flowing Fountains' – cast iron plant
- Aspidistra elatior – cast iron plant
- Aspidistra elatior 'Akebono' – gold-stripe cast iron plant
- Aspidistra elatior 'Asahi' – morning sun cast iron plant
- Aspidistra elatior (ex. 'Hoshi Zora') – cast iron plant
- Aspidistra elatior 'Fuji-no-mine' – Mt. Fuji cast iron plant
- Aspidistra elatior 'Hoshi Zora' – speckled cast iron plant
- Aspidistra elatior 'Ippin' – variegated cast iron plant
- Aspidistra elatior 'Lennon's Song' – cast iron plant
- Aspidistra elatior 'Okame' – variegated cast iron plant
- Aspidistra elatior 'Sei Ryu Ho'
- Aspidistra elatior 'Snow Cap' – variegated cast iron plant
- Aspidistra elatior 'Stars and Stripes' – cast iron plant
- Aspidistra elatior 'Taihou' – cast iron plant
- Aspidistra (large, pale spots) – cast iron plant
- Aspidistra linearifolia 'Skinny Dippin' – Skinny dippin' cast iron plant
- Aspidistra molendinacea 'Skin Tight Green Jeans' – Skin tight green jeans cast iron plant
- Aspidistra mushaensis 'Spotty Dotty' – cast iron plant
- Aspidistra oblanceifolia 'Nagoya Stars' – speckled cast iron plant
- Aspidistra omeiensis 'Come Pleated' – narrow cast iron plant
- Aspidistra omeiensis 'Jade Ribbons' – cast iron plant
- Aspidistra pulchella – cast iron plant
- Aspidistra retusa 'Nanjing Green' – cast iron plant
- Aspidistra sichuanensis 'Dappled Expectation' – cast iron plant
- Aspidistra sichuanensis 'Ghost Spots' – cast iron plant
- Aspidistra sichuanensis 'Gold Lancer' – cast iron plant
- Aspidistra sichuanensis 'Rawhide' – cast iron plant
- Aspidistra sichuanensis 'Spek-tacular' – cast iron plant
- Aspidistra sichuanensis 'Spotty' – cast iron plant
- Aspidistra (spotted) – cast iron plant
- Aspidistra sutepensis 'Doi Inthanon' – cast iron plant
- Aspidistra tonkinensis 'Hanoi Honey' – cast iron plant
- Aspidistra zongbayi (striped and spotted) – cast iron plant
- Asplenium ×ebenoides – scott's spleenwort or dragontail fern
- Asplenium scolopendrium – hart's tongue fern
- Asplenium scolopendrium (Undulatum group) – hart's tongue fern
- Aster ageratoides 'Ashvi' – white mountain aster
- Aster ageratoides 'Ezo Murasaki' – mountain aster
- Aster ageratoides var. scaberulus – mountain aster
- Aster tataricus – Tatarian aster
- Aster tataricus 'Jindai' – dwarf Tatarian aster
- Astilbe longicarpa – false goat's beard
- Astilbe rivularis var. myriantha – myriantha false goat's beard
- Athyrium
- Athyrium brevifrons – lady fern
- Athyrium filix-femina 'Cruciato-cristatum' – lady fern
- Athyrium filix-femina 'Victoriae' – lady fern
- Athyrium 'Ghost' – painted fern
- Athyrium 'Godzilla' – painted fern
- Athyrium niponicum – painted fern
- Athyrium niponicum 'Lemon Cream' – painted fern
- Athyrium niponicum var. pictum – painted fern
- Athyrium niponicum 'Regal Red' – painted fern
- Athyrium niponicum 'Thrill Seeker'
- Athyrium otophorum – eared lady fern
- Athyrium otophorum 'Okanum' – eared lady fern
- Aubrieta olympica – rock cress
- Aucuba – Japanese aucuba
- Aucuba chinensis – Chinese aucuba
- Aucuba chinensis 'Spotty'
- Aucuba japonica – Japanese aucuba
- Aucuba japonica 'Akebono' – Japanese aucuba
- Aucuba japonica 'Alabai' – Japanese aucuba
- Aucuba japonica 'Arashiyama' – variegated Japanese aucuba
- Aucuba japonica 'Big Mamma' – Japanese aucuba
- Aucuba japonica var. borealis – northern Japanese aucuba
- Aucuba japonica var. borealis 'Honshu' – Japanese aucuba
- Aucuba japonica 'Bouza Nishiki' – Japanese aucuba
- Aucuba japonica 'Cecil-Alice' – variegated Japanese aucuba
- Aucuba japonica (Chicory form) – Japanese aucuba
- Aucuba japonica 'Chirifudama' – Japanese aucuba
- Aucuba japonica 'Cho Dai Ji' – Japanese aucuba
- Aucuba japonica 'Clear Picture' – Japanese aucuba
- Aucuba japonica 'Clent Wortley Hall' – Japanese aucuba
- Aucuba japonica (contorted variegated) – Japanese aucuba
- Aucuba japonica 'Crotonifolia' – variegated Japanese aucuba
- Aucuba japonica 'Daisuke's Tiger' – Japanese aucuba
- Aucuba japonica 'Daruma-no-shima' – Japanese aucuba
- Aucuba japonica 'Eclipse' – Japanese aucuba
- Aucuba japonica 'February Star' – variegated Japanese aucuba
- Aucuba japonica 'Fructu Albo' – white-fruited Japanese aucuba
- Aucuba japonica 'Fujikawa' – Mt. Fuji Japanese aucuba
- Aucuba japonica 'Ginsu' – Japanese aucuba
- Aucuba japonica (gold sectored) – Japanese aucuba
- Aucuba japonica (gold spot flushing) – Japanese aucuba
- Aucuba japonica 'Golden King' – Japanese aucuba
- Aucuba japonica 'Goldilocks' – variegated Japanese aucuba
- Aucuba japonica 'Hakuryu' – Japanese aucuba
- Aucuba japonica 'Hasedera' – Japanese aucuba
- Aucuba japonica 'Hillieri' – Japanese aucuba
- Aucuba japonica 'Hime Kikufurin' – Japanese aucuba
- Aucuba japonica 'Hosoba Hoshifu' – Japanese aucuba
- Aucuba japonica ('Hosoba Hoshifu' sport) – Japanese aucuba
- Aucuba japonica 'Jagged Edge' – Japanese aucuba
- Aucuba japonica 'Kameba' – Japanese aucuba
- Aucuba japonica 'Katoaba' – Japanese aucuba
- Aucuba japonica 'Ki Mi' – Japanese aucuba
- Aucuba japonica 'Koshiji Nishiki' – Japanese aucuba
- Aucuba japonica (Lane's sawtooth) – Japanese aucuba
- Aucuba japonica (large teeth) – Japanese aucuba
- Aucuba japonica (large variegated - not Suruga Benten) – Japanese aucuba
- Aucuba japonica 'Leucocarpa' – white-fruit Japanese aucuba
- Aucuba japonica 'Limbata' – gold margin Japanese aucuba
- Aucuba japonica 'Linda Eggins' – Japanese aucuba
- Aucuba japonica f. longifolia – narrowleaf Japanese aucuba
- Aucuba japonica 'Mangetsu Supreme' – Japanese aucuba
- Aucuba japonica 'Marmorata' – Japanese aucuba
- Aucuba japonica 'Maruba Tensei' – Japanese aucuba
- Aucuba japonica 'Meigetsu' – gold-stripe Japanese aucuba
- Aucuba japonica 'Mellow Mushroom' – Japanese aucuba
- Aucuba japonica 'Mr. Wonderful' – dwarf Japanese aucuba
- Aucuba japonica 'Natsu-no-kumo' – Japanese aucuba
- Aucuba japonica 'Night Lights' – Japanese aucuba
- Aucuba japonica 'Ōba Nakafu' – gold-centered Japanese aucuba
- Aucuba japonica 'Other Mother' – Japanese aucuba
- Aucuba japonica 'Pacman' – dwarf Japanese aucuba
- Aucuba japonica (Paul James seedling No. 6) – variegated Japanese aucuba
- Aucuba japonica 'Peachie' – Japanese aucuba
- Aucuba japonica 'Petite Jade' – dwarf Japanese aucuba
- Aucuba japonica 'Rozannie' – Japanese aucuba
- Aucuba japonica 'Salted Pepper' – Japanese aucuba
- Aucuba japonica 'Shilpot' – Pepperpot variegated Japanese aucuba
- Aucuba japonica 'Shugetsu' – Japanese aucuba
- Aucuba japonica 'Speckles' – Japanese aucuba
- Aucuba japonica 'Tatsumaki' – Japanese aucuba
- Aucuba japonica (thin white margin) – Japanese aucuba
- Aucuba japonica 'Torafu' – Japanese aucuba
- Aucuba japonica (USNA No. 3 - female) – Japanese aucuba
- Aucuba japonica (USNA No. 5 - female) – Japanese aucuba
- Aucuba japonica 'Viridis' – Japanese aucuba
- Aucuba japonica 'White Lace' – Japanese aucuba
- Aucuba japonica (Yamaguchi giant female) – giant Japanese aucuba
- Aucuba japonica (yellow fruit) – Japanese aucuba
- Aucuba obcordata – inverted leaf aucuba
- Aucuba omeiensis – Mt. Emei aucuba
- Aucuba omeiensis (Hirose form) – Mt. Emei aucuba
- Aucuba omeiensis (small leaf) – Mt. Emei aucuba
- Babiana stricta
- Bambusa multiplex 'Fernleaf' – dwarf clumping fernleaf bamboo
- Bambusa multiplex 'Green Giant' – hedge bamboo
- Bambusa textilis 'Kanapaha' – wong chuk
- Baptisia alba var. alba Pendula Group – white wild-indigo
- Baptisia arachnifera × B. simplicifolia – wild-indigo
- Baptisia australis (Roethling blue) – blue wild-indigo
- Baptisia ×bicolor 'Starlite' – Starlite Prairieblues false indigo
- Baptisia 'Blueberry Sundae' – Decadence false indigo
- Baptisia 'Cherries Jubilee' – false indigo
- Baptisia 'Dutch Chocolate' – false indigo
- Baptisia 'Grape Escape' – wild-indigo
- Baptisia (lavender) – lavender wild-indigo
- Baptisia 'Lemon Meringue' – Decadence yellow wild-indigo
- Baptisia 'Lunar Eclipse' – false indigo
- Baptisia megacarpa – Apalachicola wild-indigo
- Baptisia (pale pink) – pink wild-indigo
- Baptisia perfoliata × B. tinctoria – hybrid indigo
- Baptisia 'Purple Smoke' – wild-indigo
- Baptisia (rock garden dwarf) – wild-indigo
- Baptisia 'Royal Candles' – false indigo
- Baptisia 'Solar Flare' – Prairieblues yellow wild-indigo
- Baptisia sphaerocarpa 'Screamin' Yellow' – yellow wild-indigo
- Baptisia sulphurea – pale yellow wild-indigo
- Baptisia 'Vanilla Cream' – Decadence wild-indigo
- Barbacenia purpurea
- Bauhinia – white orchid tree
- Bauhinia forficata – orchid tree
- Begonia – begonia
- Begonia algaia – hardy begonia
- Begonia
- Begonia 'Chandler's Hardy' – Shangri-La hardy begonia
- Begonia aff. chitoensis – hardy Taiwan begonia
- Begonia chitoensis – hardy Taiwan begonia
- Begonia emeiensis (DJHC 580) – Mount Emei begonia
- Begonia 'First Blush'
- Begonia formosana – hardy begonia
- Begonia grandis – hardy begonia
- Begonia grandis subsp. evansiana – hardy begonia
- Begonia grandis 'Pink Teardrops' – hardy begonia
- Begonia grandis subsp. sinensis – hardy begonia
- Begonia henryi – hardy begonia
- Begonia 'Immortality'
- Begonia 'Painter's Palette' – T-REX Rex begonia
- Begonia aff. palmata – hardy begonia
- Begonia pedatifida – hardy foot begonia
- Begonia aff. pedatifida – hardy begonia
- Begonia 'Red China' – begonia
- Begonia aff. silletensis – hardy begonia
- Begonia 'TNBEGDHC'
- Begonia 'Torsa'
- Belamcanda
- Belamcanda chinensis – blackberry lily
- Belamcanda chinensis 'Gone with the Wind'
- Belamcanda chinensis 'Hello Yellow' – yellow blackberry lily
- Bellevalia desertorum
- Bellevalia paradoxa
- Berberis – barberry
- Berberis chinensis – Chinese barberry
- Berberis ×gladwynensis 'William Penn' – Gladwyne barberry
- Berberis henryana – Henry's barberry
- Berberis julianae 'Spring Glory' – wintergreen barberry
- Berberis lempergiana – Chinese wintergreen barberry
- Berberis ×media 'Parkjuweel' – jeweled barberry
- Berberis ×media 'Red Jewel' – barberry
- Berberis 'Ncbx1' – Sunjoy Todo barberry
- Berberis ×ottawensis 'Concorde' – dwarf Ottawa barberry
- Berberis replicata – barberry
- Berberis thunbergii var. atropurpurea 'Bailone' – Ruby Carousel purple-leaf Japanese barberry
- Berberis thunbergii var. atropurpurea 'Golden Ring' – purple-leaf Japanese barberry
- Berberis thunbergii var. atropurpurea 'Marshall's Upright' – upright purple-leaf Japanese barberry
- Berberis thunbergii var. atropurpurea 'Red Rocket' – upright purple-leaf Japanese barberry
- Berberis thunbergii 'Aurea Nana' – golden dwarf Japanese barberry
- Berberis thunbergii 'Kelleriis' – Japanese barberry
- Berberis thunbergii 'Talago' – Sunjoy Gold Beret dwarf golden barberry
- Berberis vernae – barberry
- Berberis wilsoniae var. stapfiana – Wilson barberry
- Berberis wilsoniae var. subcaulialata – Wilson barberry
- Berberis ×wisleyensis – Wisley barberry
- Berchemia japonica
- Berlandiera lyrata – lyreleaf chocolate daisy
- Berlandiera subacaulis – Florida greeneyes
- ×Beschfreda 'Purple Passion'
- Beschorneria (B. dekosteriana × B. septentrionalis) × B. septentrionalis – hybrid false red agave
- Beschorneria septentrionalis – false red agave
- Beschorneria (septentrionalis hybrid)
- Beschorneria yuccoides – amole
- Betula alleghaniensis – yellow birch
- Betula hainanensis
- Betula nigra 'Dickinson' – Northern Tribute river birch
- Betula nigra 'Heritage' – river birch
- Betula nigra 'Little King' – Fox Valley dwarf river birch
- Betula nigra 'Studetec' – Tecumseh Compact compact river birch
- Betula pumila
- Biarum tenuifolium
- Bignonia capreolata 'Atrosanguinea' – crossvine
- Bignonia capreolata 'Helen Fredel' – crossvine
- Bignonia capreolata 'Jekyll' – crossvine
- Bignonia capreolata 'Tangerine Beauty' – crossvine
- Bischofia polycarpa – Chinese bishopwood
- Blechnum chilense
- Bletilla ochracea 'Chinese Butterfly' – Chinese butterfly orchid
- Bletilla ochracea 'Summer Sunshine' – Chinese butterfly orchid
- Bletilla striata 'Albostriata' – variegated Chinese ground orchid
- Bletilla striata 'Big Bob' – Chinese ground orchid
- Bletilla striata 'Kuchibeni' – Chinese ground orchid
- Bletilla striata 'Ogon' – Chinese ground orchid
- Bletilla Yokohama gx 'Sweet Lips' – ground orchid
- Boehmeria japonica var. tenera 'Chantilly' – spike false nettle
- Boltonia asteroides
- Bomarea acutifolia
- Bomarea × Alstroemeria
- Bomarea edulis – salsilla
- Bouteloua gracilis 'Blonde Ambition' – blue grama
- Brassaiopsis mitis
- Briggsia longipes
- Briza media – perennial quakinggrass
- Brugmansia 'Betty Marshall' – white angel's trumpet
- Brugmansia 'Inca Sun' – dwarf angel's trumpet
- Brugmansia 'Sunset' – angel's trumpet
- Brunnera 'Alexandria' – Siberian bugloss
- Brunnera macrophylla 'Emerald Mist' – variegated Siberian bugloss
- Buddleja araucana – butterfly bush
- Buddleja 'Balchryeel' – Chrysalis Steel Blue butterfly bush
- Buddleja 'Balchryink' – Chrysalis Pink butterfly bush
- Buddleja 'Balchrylu' – Chrysalis Blue butterfly bush
- Buddleja 'Balchryurp' – Chrysalis Purple butterfly bush
- Buddleja 'Blue Chip Jr.' – Lo & Behold dwarf butterfly bush
- Buddleja 'Blue Chip' – Lo & Behold compact butterfly bush
- Buddleja cordata – Mexican butterfly bush
- Buddleja davidii 'Evil Ways' – golden butterfly bush
- Buddleja davidii 'Opera' – butterfly bush
- Buddleja davidii 'Potter's Purple' – butterfly bush
- Buddleja davidii 'SMNBDPT' – Pugster Pink dwarf butterfly bush
- Buddleja (from Brazil) – butterfly bush
- Buddleja 'Grand Cascade' – butterfly bush
- Buddleja 'ILVOargus2' – Inspired Violet butterfly bush
- Buddleja 'Lavender Cupcake' – compact butterfly bush
- Buddleja 'Lilac Cascade' – butterfly bush
- Buddleja loricata – evergreen butterfly bush
- Buddleja 'Miss Ruby' – compact butterfly bush
- Buddleja 'Miss Violet' – butterfly bush
- Buddleja aff. nivea – butterfly bush
- Buddleja 'Orange Scepter'
- Buddleja 'Pink Cascade' – butterfly bush
- Buddleja 'Pink Micro Chip' – Lo & Behold dwarf butterfly bush
- Buddleja salviifolia – South African sage-wood
- Buddleja 'Tobud1202' – Buzz Hot Raspberry butterfly bush
- Buddleja 'Violet Eyes' – butterfly bush
- Buddleja ×wardii – Kingdon-Ward's butterfly bush
- Bulbine abyssinica – bushy bulbine
- Bulbine narcissifolia
- Buxus balearica – Balearic boxwood
- Buxus bodinieri – Bodinier's boxwood
- Buxus 'Conrowe' – Gordo compact boxwood
- Buxus 'Glencoe' – Chicagoland Green hybrid boxwood
- Buxus 'Green Mound' – Sheridan hybrid boxwood
- Buxus 'Green Mountain' – Sheridan hybrid boxwood
- Buxus 'Green Velvet' – Sheridan hybrid boxwood
- Buxus harlandii – Harland boxwood
- Buxus henryi – Henry's boxwood
- Buxus 'Little Missy' – dwarf boxwood
- Buxus microphylla 'Compacta' – common boxwood
- Buxus microphylla 'Curly Locks' – littleleaf boxwood
- Buxus microphylla 'File Leaf'
- Buxus microphylla 'Franklin's Gem' – littleleaf boxwood
- Buxus microphylla 'Grace Hendrick Phillips' – littleleaf boxwood
- Buxus microphylla 'Green Pillow' – littleleaf boxwood
- Buxus microphylla 'Helen Whiting' – littleleaf boxwood
- Buxus microphylla 'Henry Hohman' – littleleaf boxwood
- Buxus microphylla var. japonica – Japanese boxwood
- Buxus microphylla var. japonica 'Borderline' – variegated Japanese boxwood
- Buxus microphylla var. japonica 'Green Beauty' – Japanese boxwood
- Buxus microphylla var. japonica 'Grejade' – Baby Jade Japanese boxwood
- Buxus microphylla var. japonica 'Jim Stauffer' – littleleaf boxwood
- Buxus microphylla var. japonica 'Morris Dwarf' – Japanese boxwood
- Buxus microphylla var. japonica 'Morris Midget' – Japanese boxwood
- Buxus microphylla var. japonica 'Unraveled' – weeping Japanese boxwood
- Buxus microphylla 'John Baldwin' – littleleaf boxwood
- Buxus microphylla 'Miss Jones' – littleleaf boxwood
- Buxus microphylla 'Peergold' – Golden Dream variegated boxwood
- Buxus microphylla var. riparia – Japanese boxwood
- Buxus microphylla 'Sunnyside' – littleleaf boxwood
- Buxus 'Prostrate3' – Flat-tery dwarf boxwood
- Buxus sempervirens – common boxwood
- Buxus sempervirens 'Agram' – common boxwood
- Buxus sempervirens 'Angel's Gift' – variegated boxwood
- Buxus sempervirens 'Angustifolia' – narrowleaf common boxwood
- Buxus sempervirens 'Arctic Emerald' – upright common boxwood
- Buxus sempervirens 'Argenteovariegata' (10/10/2023) – variegated common boxwood
- Buxus sempervirens 'Aristocrat' – common boxwood
- Buxus sempervirens 'Aurea Pendula' – variegated common boxwood
- Buxus sempervirens 'Aureovariegata' – variegated common boxwood
- Buxus sempervirens 'Belleville' – common boxwood
- Buxus sempervirens 'Berlin' – common boxwood
- Buxus sempervirens 'Decussata' – common boxwood
- Buxus sempervirens 'Dee Runk' – upright common boxwood
- Buxus sempervirens 'Edgar Anderson' – common boxwood
- Buxus sempervirens 'Emerald Gumdrop' – common boxwood
- Buxus sempervirens 'Fastigiata' – common boxwood
- Buxus sempervirens 'Glauca' – common boxwood
- Buxus sempervirens 'Handsworthii' – common boxwood
- Buxus sempervirens 'Henry Shaw' – common boxwood
- Buxus sempervirens 'Highlander' – upright boxwood
- Buxus sempervirens 'Inglis' – common boxwood
- Buxus sempervirens 'Latifolia Macrophylla' – common boxwood
- Buxus sempervirens 'Latifolia Maculata' – variegated common boxwood
- Buxus sempervirens 'Memorial' – common boxwood
- Buxus sempervirens 'Myosotidifolia' – common boxwood
- Buxus sempervirens 'Myrtifolia' – common boxwood
- Buxus sempervirens 'Northland' – columnar common boxwood
- Buxus sempervirens 'Pendula' – weeping common boxwood
- Buxus sempervirens 'Ponteyi' – common boxwood
- Buxus sempervirens 'Pullman' – common boxwood
- Buxus sempervirens 'Pyramidalis' – upright common boxwood
- Buxus sempervirens 'Rosmarinifolius' – common boxwood
- Buxus sempervirens 'Rotundifolia' – common boxwood
- Buxus sempervirens 'Salicifolia' – common boxwood
- Buxus sempervirens 'Ste. Geneve' – common boxwood
- Buxus sempervirens 'Suffruticosa' – dwarf English boxwood
- Buxus sempervirens 'Valentines' – common boxwood
- Buxus sempervirens 'Vardar Valley' – common boxwood
- Buxus sempervirens 'Wanford Page' – variegated boxwood
- Buxus sempervirens 'Welleri' – common boxwood
- Buxus sempervirens 'Woodland' – common boxwood
- Buxus sinica – Chinese boxwood
- Buxus sinica var. insularis – Korean boxwood
- Buxus sinica var. insularis 'Justin Brouwers' – Korean boxwood
- Buxus sinica var. insularis 'Pincushion' – Korean boxwood
- Buxus sinica var. insularis (spreading dwarf) – spreading Korean boxwood
- Buxus sinica var. insularis 'Sunburst' – variegated Korean boxwood
- Buxus sinica var. insularis 'Tall Boy' – Korean boxwood
- Buxus sinica var. insularis 'Wintergreen' – Korean boxwood
- Buxus sinica 'Kinsha'
- Buxus wallichiana – Himalayan boxwood
- Caesalpinia gilliesii – desert bird-of-paradise
- Caesalpinia pulcherrima – pride of Barbados
- Caladium 'Celebration'
- Calamagrostis ×acutiflora 'Avalanche' – variegated feather reed grass
- Calamagrostis brachytricha – Korean feather reed grass
- Calamintha 'Marvelette Blue' – calamint
- Calibrachoa 'Balumotink'
- Calibrachoa
- Calibrachoa 'KLECA20428'
- Calibrachoa 'KLECA22915'
- Calibrachoa – Superbells Blue Moon Punch calibrachoa
- Calibrachoa
- Calibrachoa
- Calibrachoa
- Calibrachoa – Superbells Plum Improved calibrachoa
- Calibrachoa 'USCAL53002'
- Callicarpa – beautyberry
- Callicarpa acuminata – Mexican beautyberry
- Callicarpa americana 'Berries and Cream' – variegated American beautyberry
- Callicarpa americana 'Buddy's Dwarf'
- Callicarpa americana var. lactea – white-berried American beautyberry
- Callicarpa americana 'Welch's Pink' – American beautyberry
- Callicarpa bodinieri var. giraldii 'Profusion' – Bodinier beautyberry
- Callicarpa brevipes – beautyberry
- Callicarpa 'Cardinal' – beautyberry
- Callicarpa chejuensis – Korean beautyberry
- Callicarpa dichotoma f. albifructus – white beautyberry
- Callicarpa dichotoma 'Duet' – variegated beautyberry
- Callicarpa dichotoma 'Issai' – purple beautyberry
- Callicarpa dichotoma 'Spring Gold' – golden purple beautyberry
- Callicarpa formosana – Formosan beautyberry
- Callicarpa japonica – Japanese beautyberry
- Callicarpa japonica 'Heavy Berry' – Japanese beautyberry
- Callicarpa japonica 'Inagali' – variegated Japanese beautyberry
- Callicarpa japonica var. luxurians – Japanese beautyberry
- Callicarpa japonica 'Shiji Murasaki' – Wine Spritzer beautyberry
- Callicarpa kwangtungensis – Guangdong beautyberry
- Callicarpa aff. luteopunctata (white fruited)
- Callicarpa macrophylla – bigleaf beautyberry
- Callicarpa 'Moore Purple' – beautyberry
- Callicarpa 'NCCX1' – Purple Pearls beautyberry
- Callicarpa oshimensis – beautyberry
- Callicarpa rubella – beautyberry
- Callicarpa rubella var. rubella – beautyberry
- Callirhoe involucrata – winecup
- Callistemon brachyandrus – prickly bottlebrush
- Callistemon pityoides – alpine bottlebrush
- Callistemon pityoides 'Mt. Kosciuszko' – alpine bottlebrush
- Callistemon 'Woodlander's Red' – hardy bottlebrush
- Callitris rhomboidea – Port Jackson pine
- Calocedrus decurrens 'Berrima Gold' – gold California incense-cedar
- Calocedrus formosana – Formosan incense-cedar
- Calocedrus macrolepis var. macrolepis – Chinese incense-cedar
- Calochortus 'Cupido'
- Calycanthus 'Aphrodite' – hybrid sweetshrub
- Calycanthus chinensis – Chinese wax plant
- Calycanthus floridus 'Athens' – yellow common sweetshrub
- Calycanthus floridus 'Edith Wilder' – common sweetshrub
- Calycanthus floridus var. glaucus – common sweetshrub
- Calycanthus floridus var. glaucus 'Burgundy Spice' – purple-leaf sweetshrub
- Calycanthus floridus var. glaucus 'Purpureus' – purple-leaf sweetshrub
- Calycanthus floridus 'Michael Lindsay' – common sweetshrub
- Calycanthus occidentalis – western sweetshrub
- Calycanthus ×raulstonii 'Hartlage Wine' – Raulston allspice
- Calycanthus 'Venus' – hybrid sweetshrub
- Calylophus 'Lemonade'
- Calylophus 'Sunglow' – Ladybird Texas primrose
- Camassia 'Blue Candle'
- Camassia cusickii – Cussick's camas
- Camassia cusickii 'Zwanenburg'
- Camassia leichtlinii 'Alba' – great camas
- Camassia leichtlinii 'Pink Star' – great camas
- Camassia leichtlinii 'Sacajawea' – great camas
- Camassia leichtlinii 'Semiplena' – great camas
- Camassia quamash – small camas
- Camassia quamash 'Blue Melody' – small camas
- Camellia 'Autumn Spirit' – sasanqua camellia
- Camellia brevistyla × C. sasanqua 'Green 09-003' – sasanqua camellia
- Camellia brevistyla f. rubida – short-styled camellia
- Camellia 'Carolina Moonmist' – Cochran camellia
- Camellia 'Cinnamon Cindy' – Ackerman camellia
- Camellia 'Crimson Candles' – camellia
- Camellia fluviatilis
- Camellia fraterna – small-flowered camellia
- Camellia 'Green 98-013'
- Camellia ×hiemalis 'Dazzler' – camellia
- Camellia ×hiemalis 'Green's Blues' – camellia
- Camellia ×hiemalis 'Rose of Autumn' – camellia
- Camellia ×hiemalis 'Shishi Gashira' – camellia
- Camellia japonica – Japanese camellia
- Camellia japonica 'Anacostia' – Japanese camellia
- Camellia japonica 'April Dawn' – Japanese camellia
- Camellia japonica 'April Tryst' – Japanese camellia
- Camellia japonica 'Benten-kagura' – Japanese camellia
- Camellia japonica 'Benten-shiratama' – Japanese camellia
- Camellia japonica × C. cuspidata
- Camellia japonica 'Curly Lady' – Japanese camellia
- Camellia japonica 'Debutante Benten' – variegated Japanese camellia
- Camellia japonica 'Dr. J.C. Raulston' – Japanese Camellia
- Camellia japonica (fishtail, white w/ red stripes) – fish-tail Japanese camellia
- Camellia japonica 'Geoff Hamilton' – variegated Japanese camellia
- Camellia japonica 'Hokkaido Red' – Japanese camellia
- Camellia japonica 'Jacks' – Japanese camellia
- Camellia japonica 'Kifukurin-benikarako' – Japanese camellia
- Camellia japonica (Korean germplasm) – Japanese camellia
- Camellia japonica 'Kujaku Tsubaki' – peacock Japanese camellia
- Camellia japonica 'Kuro Delight' – Japanese camellia
- Camellia japonica 'Professor Charles S. Sargent' – Japanese camellia
- Camellia japonica 'Quercifolia' – fish-tail Japanese camellia
- Camellia japonica 'Reg Ragland' – Japanese camellia
- Camellia japonica var. rusticana 'Ai-no-izumi' – fountain of love Japanese camellia
- Camellia japonica var. rusticana 'Koshi-no-fubuki'
- Camellia japonica var. rusticana 'Madoka' – sake cup Japanese camellia
- Camellia japonica 'Shirobotan' – Japanese camellia
- Camellia japonica 'Tafuku-benten' – variegated Japanese camellia
- Camellia japonica 'Tama Peacock' – picotee Japanese camellia
- Camellia japonica (variegated, pink double) – Japanese camellia
- Camellia japonica 'White By The Gate' – Japanese camellia
- Camellia japonica 'White Mermaid' – fish-tail Japanese camellia
- Camellia japonica 'White Perfection' – Japanese camellia
- Camellia 'Kikuzuki' – camellia
- Camellia 'Kokin Gold' – camellia
- Camellia 'Koto-no-kaori' – camellia
- Camellia 'Londontowne Blush' – camellia
- Camellia oleifera – tea-oil camellia
- Camellia (oleifera hybrid, weeping)
- Camellia 'Robiraki' – Summer Beauty camellia
- Camellia rosaeflora
- Camellia sasanqua 'Autumn Rocket' – sasanqua camellia
- Camellia sasanqua 'Fuji-no-yuki' – sasanqua camellia
- Camellia sasanqua 'Green 01-006' – October Magic Carpet sasanqua camellia
- Camellia sasanqua 'Green 02-003' – October Magic Ruby sasanqua camellia
- Camellia sasanqua 'Green 94-035' – October Magic Orchid camellia
- Camellia sasanqua 'Green 99-031' – Susy Dirr sasanqua camellia
- Camellia sasanqua 'Hanajiman' – sasanqua camellia
- Camellia sasanqua 'Marie Kirk' – sasanqua camellia
- Camellia sasanqua 'Ogonba' – sasanqua camellia
- Camellia sasanqua 'Reverend Ida' – sasanqua camellia
- Camellia sasanqua 'Rosy Pillar' – sasanqua camellia
- Camellia sasanqua 'Sarrel' – sasanqua camellia
- Camellia sasanqua 'Seventh Desire' – sasanqua camellia
- Camellia sasanqua 'TDN 1116' – Bella Rouge / Hot Flash sasanqua camellia
- Camellia sasanqua 'William Lanier Hunt' – sasanqua camellia
- Camellia sasanqua 'Yuletide' – sasanqua camellia
- Camellia sasanqua ('Yuletide' variegated sport) – sasanqua camellia
- Camellia sinensis – tea camellia
- Camellia sinensis 'Christine's Choice' – tea camellia
- Camellia sinensis 'Fuiri' – tea camellia
- Camellia sinensis 'O. Kuntze' – tea camellia
- Camellia sinensis 'Silver Dust' – tea camellia
- Camellia sinensis 'Unryu' – tea camellia
- Camellia 'Snow Blizzard' – camellia
- Camellia 'Snow Flurry' – Ackerman camellia
- Camellia 'Sweet Jane' – camellia
- Camellia aff. transarisanensis – snowbells camellia
- Camellia transnokoensis – Mount Noko camellia
- Camellia transnokoensis (Hogan) – Mount Noko camellia
- Camellia tsaii 'Erina' – cascading camellia
- Camellia ×vernalis 'Christmas Candy' – camellia
- Camellia ×vernalis 'Egao Corkscrew' – contorted vernal camellia
- Camellia ×vernalis 'Egao Spring Snowfall' – vernal camellia
- Camellia ×vernalis 'Ginryu' – vernal camellia
- Camellia ×vernalis 'Hiryû' – vernal camellia
- Camellia ×vernalis 'Shibori Egao' – camellia
- Camellia ×williamsii 'Golden Spangles' – variegated Williamsii camellia
- Camellia ×williamsii 'Mary Christian' – Williamsii camellia
- Camellia 'Winter's Charm' – Ackerman camellia
- Camellia 'Winter's Dream' – Ackerman camellia
- Camellia 'Winter's Star' – Ackerman camellia
- Camellia 'Winter's Star Light' – camellia
- Camellia 'Wirlinga Bride' – camellia
- Camellia 'Yoimachi' – camellia
- Camellia 'Yume' – camellia
- Campanula alliariifolia – ivory bells
- Campanula bononiensis – European bellflower
- Campanula celsii – bellflower
- Campanula cervicaria
- Campanula garganica 'Dickson's Gold' – golden bellflower
- Campanula glomerata – clustered bellflower
- Campanula grossekii
- Campanula takesimana – Korean bellflower
- Campanula takesimana 'Elizabeth' – Korean bellflower
- Campsis radicans 'Apricot' – trumpet vine
- Campsis radicans (Bahama yellow) – trumpet vine
- Campsis radicans 'Flava' – trumpet vine
- Campsis radicans 'Stromboli' – Atomic Red red trumpet vine
- Campsis ×tagliabuana 'Guilfoylei' – trumpet vine
- Canna – canna lily
- Canna 'African Sunset' – canna lily
- Canna 'Australia' – canna lily
- Canna – CannaSol Happy Cleo canna lily
- Canna 'Cleopatra' – canna lily
- Canna compacta × C. patens – canna lily
- Canna 'Constitution' – canna lily
- Canna 'Flaming Kabobs' – canna lily
- Canna gigantea – canna lily
- Canna indica – canna lily
- Canna 'Mary's Gold' – canna lily
- Canna musifolia – banana canna
- Canna occidentalis – canna lily
- Canna 'Orange Punch' – canna lily
- Canna 'Pacific Beauty' – canna lily
- Canna 'Panache' – canna lily
- Canna patens – canna lily
- Canna (peach) – canna lily
- Canna 'Red Wine' – canna lily
- Canna 'Striata' – canna lily
- Canna 'Thai One On' – canna lily
- Canna 'Valentine' – canna lily
- Canna (variegated) – canna lily
- Canna 'Warszewiczii' – canna lily
- Canna (yellow seedling)
- Caragana microphylla 'Mongolian Silver Spires'
- Cardamine bulbosa 'Snow Showers' – toothwort
- Cardamine diphylla – toothwort
- Cardamine diphylla 'Bama Jama' – toothwort
- Cardamine douglassii 'Southern Lady'
- Cardamine quinquefolia
- Cardiocrinum cathayanum – Himalayan lily
- Carex amphibola – eastern narrowleaf sedge
- Carex annectens – sedge
- Carex berggrenii – Berggren's sedge
- Carex cherokeensis – Cherokee sedge
- Carex ciliatomarginata 'Treasure Island' – sedge
- Carex comans – Amazon Mist New Zealand hair sedge
- Carex comans 'Olive Oil'
- Carex divulsa – grassland sedge
- Carex 'ET CRX01' – Feather Falls variegated sedge
- Carex 'ET CRX02' – Ribbon Falls sedge
- Carex flacca – carnation grass
- Carex flacca 'Blue Zinger' – sedge
- Carex flaccosperma – blue wood sedge
- Carex flagellifera 'Kiwi' – New Zealand sedge
- Carex frankii – Frank's sedge
- Carex grayi – Gray's sedge
- Carex laxiculmis 'Hobb' – Bunny Blue creeping sedge
- Carex lupulina – sedge
- Carex morrowii 'Silver Sceptre' – variegated Japanese sedge
- Carex oshimensis 'Carfit01' – Evercolor Everest white variegated Japanese sedge
- Carex oshimensis 'Evergold' – striped weeping sedge
- Carex oshimensis 'Everillo' – Evercolor Japanese sedge
- Carex oshimensis 'Everlime' – EverColor Japanese sedge
- Carex oshimensis 'Eversheen' – EverColor variegated Japanese sedge
- Carex pendula – weeping sedge
- Carex phyllocephala 'Sparkler' – carnation grass
- Carex radiata 'Halifax' – eastern star sedge
- Carex scaposa – cherry blossom sedge
- Carex siderosticta 'Banana Boat' – variegated creeping broad-leafed sedge
- Carex socialis 'Coahoma' – sedge
- Carex squarrosa – narrow-leaved cattail sedge
- Carex stricta – tussock sedge
- Carex testacea 'Prairie Fire' – New Zealand sedge
- Carex texensis – Texas sedge
- Carlina acaulis subsp. caulescens – weather thistle
- Carpinus – hornbeam
- Carpinus betulus 'Columnaris' – dwarf columnar European hornbeam
- Carpinus betulus 'Dervaesii' – weeping Vienna hornbeam
- Carpinus betulus 'Pendula' – weeping European hornbeam
- Carpinus caroliniana 'Stowe Cascade' – weeping American hornbeam
- Carpinus caroliniana 'Uxbridge' – Rising Fire American hornbeam
- Carpinus cordata – heart-leaf hornbeam
- Carpinus coreana – Korean ironwood
- Carpinus henryana var. simplicidentata – hornbeam
- Carpinus hupeana
- Carpinus japonica – Japanese hornbeam
- Carpinus japonica 'Silver Lace' – cutleaf Japanese hornbeam
- Carpinus kawakamii – hornbeam
- Carpinus laxiflora – loose-flower hornbeam
- Carpinus omeiensis – Mt. Omei hornbeam
- Carpinus orientalis – oriental hornbeam
- Carpinus tschonoskii – Yeddo hornbeam
- Carpinus turczaninowii – Tatarian hornbeam
- Carpinus viminea – hornbeam
- Carrierea calycina – goat horn tree
- Cartrema americana 'Woodlanders Amanda' – variegated wild olive
- Caryopteris ×clandonensis 'Blauersplatz'
- Caryopteris ×clandonensis 'Emerald Crest'
- Caryopteris ×clandonensis 'Gold Crest' – bluebeard
- Caryopteris ×clandonensis 'White Surprise' – variegated bluebeard
- Caryopteris divaricata 'Blue Butterflies' – bluebeard
- Caryopteris incana (prostrate)
- Castanea henryi – Chinese chinquapin
- Castanopsis cuspidata – Japanese chinquapin
- Castanopsis delavayi – Delavay's chinquapin
- Castanopsis sclerophylla – Chinese tan-bark oak
- Catalpa bignonioides 'Aurea' – gold-leaf catalpa
- Catalpa (Ecos strain)
- Catalpa speciosa 'Hiawatha 2' – Heartland northern catalpa
- Cathaya argyrophylla – cathaya
- Ceanothus ×delilianus 'Henri Desfossé' – hybrid ceanothus
- Ceanothus 'Topaz'
- Cedrus atlantica 'Argentea Fastigiata' – columnar blue Atlas cedar
- Cedrus deodara 'Compacta' – compact Deodar cedar
- Cedrus deodara 'Electra' – Deodar cedar
- Cedrus deodara 'Feelin' Blue' – spreading Deodar cedar
- Cedrus deodara 'Gemstone' – Deodar cedar
- Cedrus deodara 'Glacier Blue' – dwarf Deodar cedar
- Cedrus deodara 'Pendula' – weeping Deodar cedar
- Cedrus deodara 'Prostrate Beauty' – prostrate Deodar cedar
- Cedrus deodara 'Raywood's Contorted' – contorted Deodar cedar
- Cedrus deodara 'Silver' – Deodar cedar
- Cedrus libani subsp. brevifolia – Cyprian cedar
- Cedrus libani 'Katere'
- Celtis edulis – hackberry
- Celtis julianae – Julian hackberry
- Celtis koraiensis – Korean hackberry
- Celtis sinensis – Japanese hackberry
- Celtis sinensis 'Green Cascade' – weeping Chinese hackberry
- Celtis tenuifolia – dwarf hackberry
- Centaurea ragusina 'Balcentsirl'
- Cephalanthus occidentalis 'Bailoptics' – First Editions Fiber Optics buttonbush
- Cephalanthus occidentalis 'Just Deserts' – buttonbush
- Cephalotaxus – plum yew
- Cephalotaxus fortunei – Chinese plum yew
- Cephalotaxus fortunei var. alpina – alpine Chinese plum yew
- Cephalotaxus (gold form) – plum yew
- Cephalotaxus harringtonia – Japanese plum yew
- Cephalotaxus harringtonia 'Fastigiata' – upright Japanese plum yew
- Cephalotaxus harringtonia 'Fritz Huber' – dwarf Japanese plum yew
- Cephalotaxus harringtonia 'Gnome' – dwarf Harrington plum yew
- Cephalotaxus harringtonia 'H.W. Sargent' – dwarf Japanese plum yew
- Cephalotaxus harringtonia var. koreana – Korean plum yew
- Cephalotaxus harringtonia var. koreana 'Korean Gold' – golden Korean plum yew
- Cephalotaxus harringtonia 'Mary Fleming' – dwarf Japanese plum yew
- Cephalotaxus harringtonia 'Pedunculata' – Harrington plum yew
- Cephalotaxus harringtonia 'Plania' (Yewtopia) – Japanese plum yew
- Cephalotaxus harringtonia 'Prostrata' – spreading Japanese plum yew
- Cephalotaxus harringtonia 'Watnong' – spreading Japanese plum yew
- Cephalotaxus lanceolata – Yunnan plum yew
- Cephalotaxus sinensis – Chinese plum yew
- Cephalotaxus sinensis (Peckerwood dense form) – Chinese plum yew
- Cerastium alpinum subsp. alpinum – alpine chickweed
- Ceratostigma griffithii – Griffith's blue leadwort
- Ceratostigma griffithii 'Snow Flurries' – white Griffith's leadwort
- Ceratostigma willmottianum – Chinese plumbago
- Cercidiphyllum japonicum – katsura tree
- Cercidiphyllum japonicum 'Morioka Weeping' – weeping katsura
- Cercidiphyllum japonicum 'Peach' – katsura
- Cercis – redbud
- Cercis 'Big John' – hybrid redbud
- Cercis canadensis 'Ace of Hearts' – compact eastern redbud
- Cercis canadensis f. alba – white flowered eastern redbud
- Cercis canadensis 'Alley Cat' – variegated eastern redbud
- Cercis canadensis 'Appalachian Red' – eastern redbud
- Cercis canadensis 'Cascading Hearts' – weeping eastern redbud
- Cercis canadensis 'Crosswicks Red' – eastern redbud
- Cercis canadensis 'Dwarf White' – eastern redbud
- Cercis canadensis 'Flame' – double flowered eastern redbud
- Cercis canadensis 'Gold Crown' – gold leaf eastern redbud
- Cercis canadensis 'Greswan' – Burgundy Hearts purple leaf eastern redbud
- Cercis canadensis 'Hearts of Gold' – gold-leaf eastern redbud
- Cercis canadensis 'JN15' – Rise 'N Shine eastern redbud
- Cercis canadensis 'JN16' – Black Pearl eastern redbud
- Cercis canadensis 'JN2' – The Rising Sun gold leaf eastern redbud
- Cercis canadensis 'JN7' – Summers Tower upright eastern redbud
- Cercis canadensis (large leaf form) – eastern redbud
- Cercis canadensis 'Merlot' – purple leaf redbud
- Cercis canadensis var. mexicana 'Bonita' – Mexican redbud
- Cercis canadensis var. mexicana 'Sanderson' – Mexican redbud
- Cercis canadensis 'NC2014-10' – Gilded Hearts eastern redbud
- Cercis canadensis 'NC2014-5' – Garden Gems Emerald eastern redbud
- Cercis canadensis 'NC2015-12' – Golden Falls eastern redbud
- Cercis canadensis 'NC2016-2' – Flame Thrower eastern redbud
- Cercis canadensis 'NC2017-6' – Garden Gems Amethyst eastern redbud
- Cercis canadensis 'NC2017-8' – Garden Gems Amethyst Cascade redbud
- Cercis canadensis 'Pink Heartbreaker' – weeping eastern redbud
- Cercis canadensis 'Pink Pom Poms' – double flowered eastern redbud
- Cercis canadensis 'Royal White' – white flowered eastern redbud
- Cercis canadensis 'Ruby Falls' – weeping eastern redbud
- Cercis canadensis 'Silver Cloud' – variegated eastern redbud
- Cercis canadensis 'Sjo' – Cotton Candy eastern redbud
- Cercis canadensis var. texensis 'Oklahoma' – dark flowered Texas redbud
- Cercis canadensis var. texensis 'Oklahoma' (variegated) – eastern redbud
- Cercis canadensis var. texensis 'Texas White' – white Texas redbud
- Cercis canadensis var. texensis 'Traveller' – weeping Texas redbud
- Cercis canadensis 'Tom Thumb' – little leaf eastern redbud
- Cercis canadensis 'Whitewater' – weeping variegated eastern redbud
- Cercis chinensis – Chinese redbud
- Cercis chinensis 'Celestial Plum' – smooth redbud
- Cercis chinensis 'Don Egolf' – Chinese redbud
- Cercis chinensis (dwarf form) – dwarf Chinese redbud
- Cercis chinensis 'Genpei' – Chinese redbud
- Cercis chinensis 'Kay's Early Hope' – Chinese redbud
- Cercis chinensis 'Reznicek' – dwarf Chinese redbud
- Cercis chinensis 'Shibamichi Red' – Chinese redbud
- Cercis chinensis 'Shirobana' – white Chinese redbud
- Cercis chinensis 'Shishiba' – contorted Chinese redbud
- Cercis chingii – Ching's redbud
- Cercis chuniana – Chun's redbud
- Cercis griffithii – Afghan redbud
- Cercis (hybrid)
- Cercis (hybrid no. 1)
- Cercis (hybrid no. 2)
- Cercis (hybrid no. 3)
- Cercis 'NC2017-9' – Garden Gems Emerald Falls weeping redbud
- Cercis 'NC2021-2'
- Cercis racemosa – chain-flowered redbud
- Cercis racemosa (cold hardy form) – chain-flowered redbud
- Cercis 'Wavecrest' – hybrid redbud
- Cestrum corymbosum 'WNCESCORYEL' – Juiced Orange jessamine
- Cestrum 'Lemon Peel'
- Cestrum 'Orange Peel' – hybrid jessamine
- Cestrum parqui – willow-leaved jessamine
- Chaenomeles 'Dragon's Blood' – Japanese flowering quince
- Chaenomeles japonica 'Chojuraku' – Japanese flowering quince
- Chaenomeles japonica 'Hime' – Japanese flowering quince
- Chaenomeles 'NCCS4' – Double Take Peach Japanese flowering quince
- Chaenomeles 'Orange Storm' – Double Take hybrid flowering quince
- Chaenomeles 'Pink Storm' – Double Take Pink flowering quince
- Chaenomeles 'Scarff's Red' – hybrid flowering quince
- Chaenomeles 'Scarlet Storm' (Double Take) – hybrid flowering quince
- Chaenomeles speciosa – flowering quince
- Chaenomeles speciosa 'Contorta' – contorted flowering quince
- Chaenomeles speciosa 'Mt. Fuji' – flowering quince
- Chaenomeles speciosa 'Orange Delight' – flowering quince
- Chaenomeles speciosa 'Red Charlet' – flowering quince
- Chaenomeles ×superba 'Jet Trail' – hybrid flowering quince
- Chaenomeles ×superba 'Mandarin' – hybrid flowering quince
- Chaenomeles ×superba 'Texas Scarlet' – hybrid flowering quince
- Chamaecyparis lawsoniana 'Blue Surprise' – Lawson's cypress
- Chamaecyparis lawsoniana 'Filip's Golden Tears' – Lawson's cypress
- Chamaecyparis lawsoniana 'Green Globe' – Lawson's cypress
- Chamaecyparis lawsoniana 'Imbricata Pendula' – Lawson's cypress
- Chamaecyparis obtusa 'Aurea' – hinoki falsecypress
- Chamaecyparis obtusa 'Chirimen' – hinoki falsecypress
- Chamaecyparis obtusa 'Confucius' – hinoki falsecypress
- Chamaecyparis obtusa 'Gold Post' – hinoki falsecypress
- Chamaecyparis obtusa 'Gracilis' – hinoki falsecypress
- Chamaecyparis obtusa 'Green Cushion' – hinoki falsecypress
- Chamaecyparis obtusa 'Hibari' – hinoki falsecypress
- Chamaecyparis obtusa 'Kosteri' – hinoki falsecypress
- Chamaecyparis obtusa 'Leprechaun' – hinoki falsecypress
- Chamaecyparis obtusa 'Lougheed' – hinoki falsecypress
- Chamaecyparis obtusa 'Lynn's Golden' – hinoki falsecypress
- Chamaecyparis obtusa 'Moonshine' – hinoki falsecypress
- Chamaecyparis obtusa 'Nana Gracilis' – hinoki falsecypress
- Chamaecyparis obtusa 'Nana Lutea' – hinoki falsecypress
- Chamaecyparis obtusa 'Oregon Crested' – hinoki falsecypress
- Chamaecyparis obtusa 'Special Variegated' – hinoki falsecypress
- Chamaecyparis obtusa 'Vokel's Upright' – hinoki falsecypress
- Chamaecyparis pisifera 'Cream Ball' – Sawara cypress
- Chamaecyparis pisifera 'Filifera' – Sawara cypress
- Chamaecyparis pisifera 'Filip's Happy Day' – Sawara cypress
- Chamaecyparis pisifera 'Gekko' – Sawara cypress
- Chamaecyparis pisifera 'Golddust' – Sawara cypress
- Chamaecyparis pisifera 'Juniperoides' – Sawara cypress
- Chamaecyparis pisifera 'Tsukumo' – dwarf Sawara cypress
- Chamaecyparis thyoides (fastigiate) – white cypress
- Chamaecyparis thyoides 'Lovett's Goldzwerg'
- Chamaecyparis thyoides 'Red Velvet' – Atlantic white-cedar
- Chamaecyparis thyoides 'Tom's Blue' – Atlantic white-cedar
- Chamaecyparis thyoides 'Top Point' – Atlantic white-cedar
- Chamaecyparis thyoides 'Yankee Blue' – Atlantic white-cedar
- Chasmanthium latifolium – river oats
- Chasmatophyllum musculinum
- Chelone glabra 'Black Ace' – white turtlehead
- Chelonopsis moschata – Japanese turtlehead
- Chelonopsis 'Stonewall Pink' – Japanese turtlehead
- Chilopsis linearis 'Angel White' – desert willow
- Chilopsis linearis 'Bubba' – desert willow
- Chimonanthus nitens – evergreen chimonanthus
- Chimonanthus praecox – wintersweet
- Chimonanthus praecox 'Luteus' – wintersweet
- Chimonanthus zhejiangensis – glossy chimonanthus
- Chionanthus pygmaeus – pygmy fringetree
- Chionanthus retusus – Chinese fringe tree
- Chionanthus retusus 'China Snow' – Chinese fringe tree
- Chionanthus retusus 'Ivory Tower' – columnar Chinese fringe tree
- Chionanthus retusus 'Tokyo Tower' – Chinese fringe tree
- Chionanthus retusus 'Yadkin Creeper' – weeping Chinese fringetree
- Chionanthus virginicus (Bob Moore variegated) – variegated fringetree
- Chionanthus virginicus 'White Knight' – American fringe tree
- Chionodoxa forbesii
- Chionodoxa forbesii 'Pink Giant'
- Chionodoxa luciliae
- Chionodoxa sardensis – glory of the snow
- ×Chitalpa 'NCXC1' – El Niño desert orchid
- ×Chitalpa tashkentensis 'Morning Cloud' – chitalpa
- ×Chitalpa tashkentensis 'Strawberry Moon'
- Chlidanthus fragrans
- Chloranthus erectus – upright chloranthus
- Chloranthus japonicus
- Chloranthus serratus
- Chloranthus sessilifolius var. austrosinensis
- Chloranthus sessilifolius 'Get Shorty' – sessile-leaf chloranthus
- Chlorophytum – spider plant
- Chlorophytum cf. bowkeri – African snake lily
- Chlorophytum capense – bracketplant
- Chlorophytum nepalense
- Chlorophytum saundersiae – weeping spider plant
- Chlorophytum sparsiflorum
- Choisya ×dewitteana 'Limo' – Goldfingers Mexican orange
- Chrysactinia mexicana – damianita
- Chrysanthemum 'Brandywine Sunset' – hardy chrysanthemum
- Chrysanthemum 'Cathy's Rust' – garden chrysanthemum
- Chrysanthemum 'Country Girl' – garden chrysanthemum
- Chrysanthemum 'Crystal Falls' – garden chrysanthemum
- Chrysanthemum (double cream) – garden chrysanthemum
- Chrysanthemum (Elizabeth Lawrence pink) – garden chrysanthemum
- Chrysanthemum 'Firefall' – garden chrysanthemum
- Chrysanthemum 'Gethsemane Moonlight' – garden chrysanthemum
- Chrysanthemum 'Golden Lida Thomas' – garden chrysanthemum
- Chrysanthemum 'Icicles' – garden chrysanthemum
- Chrysanthemum indicum – Apple Valley garden chrysanthemum
- Chrysanthemum 'Kurume' – garden chrysanthemum
- Chrysanthemum 'Lavender Lady' – garden chrysanthemum
- Chrysanthemum 'Maryl' – garden chrysanthemum
- Chrysanthemum 'Miss Gloria's Thanksgiving Day' – garden chrysanthemum
- Chrysanthemum 'Mrs. Robinson' – garden chrysanthemum
- Chrysanthemum 'Norton Vic' – garden chrysanthemum
- Chrysanthemum (pink cascading) – garden chrysanthemum
- Chrysanthemum (rusty orange, large flowered cascading) – garden chrysanthemum
- Chrysanthemum (rusty orange, small flowered cascading) – garden chrysanthemum
- Chrysanthemum 'Sheffield Pink' – garden chrysanthemum
- Chrysanthemum (single red) – garden chrysanthemum
- Chrysanthemum 'Venus' – garden chrysanthemum
- Chrysanthemum weyrichii 'Apricot' – Weyrich's chrysanthemum
- Chrysanthemum (yellow button) – garden chrysanthemum
- Chrysogonum virginianum 'Allen Bush' – green-and-gold
- Chrysogonum virginianum 'Eco Lacquered Spider' – green-and-gold
- Chrysogonum virginianum 'Pierre' – green-and-gold
- Chrysojasminum parkeri – Parker's jasmine
- Cinnamomum japonicum – Japanese camphor
- Cinnamomum jensenianum
- Cinnamomum wilsonii – Wilson's camphor-tree
- Cissus trifoliata – marine ivy
- Cistus 'Mickie' – variegated rockrose
- Cistus monspeliensis – Montpellier rockrose
- Citrus cavaleriei – Ichang lemon
- Citrus japonica – round kumquat
- Citrus (trifoliata × auranticum) – citradia
- Citrus trifoliata 'Flying Dragon' – hardy orange
- Citrus trifoliata (gold contorted) – hardy orange
- Citrus (trifoliata × paradisi 'Dunstan') – citrumelo
- Citrus trifoliata 'Snow Dragon' – hardy orange
- Cladrastis kentukea 'Perkins Pink' – pink flowered American yellowwood
- Cladrastis platycarpa – Japanese yellowwood
- Cladrastis sinensis 'China Rose' – pink Chinese yellowwood
- Clara ophiopogonoides
- Clematis – clematis
- Clematis armandii – evergreen clematis
- Clematis cirrhosa – winter clematis
- Clematis 'Cleminov 51' – Sapphire Indigo clematis
- Clematis 'Cleminov29' – Saphyra Double Rose clematis
- Clematis 'Duchess of Edinburgh' – white flowering clematis
- Clematis 'Fireworks' – clematis
- Clematis fremontii – Fremont's leather flower
- Clematis fruticosa 'Mongolian Gold' – clematis
- Clematis fusca – clematis
- Clematis integrifolia 'Alba' – solitary clematis
- Clematis integrifolia 'Blue Boy' – clematis
- Clematis 'Kilian Donahue' – reblooming clematis
- Clematis 'Omoshiro' – clematis
- Clematis recta 'Lime Close' – Serious Black clematis
- Clematis reticulata × C. texensis – clematis
- Clematis 'Rooguchi' – clematis
- Clematis 'Scented Clem' – Sugar-Sweet Blue clematis
- Clematis 'Stand by Me' – clematis
- Clematis 'Stand by Me Pink' – bush clematis
- Clematis 'Sweet Summer Love' – clematis
- Clematis texensis (re-blooming form) – clematis
- Clematis tibetana – Tibetan clematis
- Clematis 'Violet Stardust' – bush clematis
- Clematis 'Vitiwester' – Burning Love clematis
- Clerodendrum cyrtophyllum
- Clerodendrum paniculatum 'Starshine' – pagoda flower
- Clerodendrum wallichii – bridal-veil glorybower
- Clethra alnifolia – summersweet
- Clethra alnifolia 'Hokie Pink' – summersweet
- Clethra alnifolia 'Ruby Spice' – summersweet
- Clethra alnifolia 'Sherry Sue' – summersweet
- Clethra alnifolia 'Sixteen Candles' – dwarf summersweet
- Clethra barbinervis 'Takeda Nishiki' – First Snow variegated Japanese clethra
- Clethra fargesii – Farges clethra
- Clethra pringlei – Mexican clethra
- Cleyera japonica – Japanese cleyera
- Cleyera japonica 'Variegata' – Romeo variegated Japanese cleyera
- Clinopodium georgianum 'WAH/SS' – Sweet Savannah calamint
- Clinopodium grandiflorum 'Variegata' – variegated calamint
- Clinopodium nepeta – lesser calamint
- Clinopodium nepeta subsp. glandulosum 'White Cloud' – lesser calamint
- Clinopodium nepeta 'Montrose White' – lesser calamint
- Clinopodium nepeta subsp. nepeta – lesser calamint
- Clinopodium vulgare – wild basil
- Clitoria
- Codonopsis clematidea – bonnet bellflower
- Codonopsis lanceolata – bonnet bellflower
- Codonopsis ussuriensis
- Colchicum soboliferum
- Colletia hystrix – bristly colletia
- Colletia paradoxa – anchor plant
- Collinsonia japonica (ex. 'Snow White')
- Colocasia esculenta 'Aloha' – elephant ear
- Colocasia esculenta ('Fontanesii' green stem form) – elephant ear
- Colocasia esculenta 'Maui Gold' – elephant ear
- Colocasia gigantea (Thailand giant form) – super-sized elephant ear
- Columnea microcalyx
- Comanthosphace japonica 'Gin Santo Naka Fu' – silver Japanese shrub mint
- Comanthosphace japonica 'Golden Angel' – gold Japanese shrub mint
- Coniogramme emeiensis 'Golden Zebra' – variegated bamboo fern
- Coniogramme gracilis – bamboo fern
- Coniogramme intermedia 'Rasha' – bamboo fern
- Coniogramme intermedia 'Yoroi Musha' – bamboo fern
- Coniogramme japonica – Japanese bamboo fern
- Coniogramme jinggangshanensis 'Shishi' – bamboo fern
- Convallaria majalis – lily-of-the-valley
- Convallaria majalis 'Fernwood's Golden Slippers' – lily-of-the-valley
- Convallaria majalis 'Flore Pleno' – lily-of-the-valley
- Convallaria majalis 'Golden Jubilee' – lily-of-the-valley
- Convallaria majalis 'Hardwick Hall' – lily-of-the-valley
- Convallaria majalis 'Striata' – lily-of-the-valley
- Coprosma propinqua – mingimingi
- Cordyline australis – New Zealand cabbage tree
- Cordyline australis 'Torbay Dazzler'
- Coreopsis auriculata 'Nana' – dwarf mouse ear coreopsis
- Coreopsis helianthoides – Beadle’s tickseed
- Coreopsis 'Jewel'
- Coreopsis major – greater tickseed
- Coreopsis tripteris 'Lightning Flash'
- Coreopsis verticillata 'Zagreb' – tickseed
- Coreopsis verticillata 'Zesty Zinger' – Sizzle & Spice tickseed
- Coriaria terminalis var. xanthocarpa
- Cornus alba 'ByBoughen' – First Editions Neon Burst Tartarian dogwood
- Cornus alba 'Minbat' – First Editions Baton Rouge Tatarian dogwood
- Cornus alba 'UMN970507' – Garden Glow Tatarian dogwood
- Cornus alternifolia 'Wstackman' – Golden Shadows variegated pagoda dogwood
- Cornus amomum subsp. obliqua – silky dogwood
- Cornus capitata – Himalayan evergreen dogwood
- Cornus capitata 'Legacy'
- Cornus controversa – giant dogwood
- Cornus controversa 'June Snow' – giant dogwood
- Cornus controversa 'Laska' – giant dogwood
- Cornus elliptica 'First Choice' – evergreen flowering dogwood
- Cornus elliptica 'NCCE1' – Lucky Leprechaun Evergreen Dogwood
- Cornus florida 'Appalachian Spring' – flowering dogwood
- Cornus florida 'JN13' – Ragin' Red red flowering dogwood
- Cornus florida 'Pygmaea' – dwarf flowering dogwood
- Cornus florida subsp. urbiniana – Mexican flowering dogwood
- Cornus foemina – swamp dogwood
- Cornus 'Gloria Birkett' – dogwood
- Cornus hongkongensis – evergreen dogwood
- Cornus aff. hongkongensis
- Cornus hongkongensis 'Gekkou' – moonshine evergreen dogwood
- Cornus hongkongensis subsp. melanotricha – evergreen dogwood
- Cornus aff. hongkongensis (white fruit) – evergreen dogwood
- Cornus iberica – dogwood
- Cornus 'KN30-8' – Venus hybrid dogwood
- Cornus kousa 'Blue Shadow' – kousa dogwood
- Cornus kousa subsp. chinensis 'Aiden's Mint Frost' – Chinese dogwood
- Cornus kousa subsp. chinensis 'Propzam' – Prophet Chinese dogwood
- Cornus kousa subsp. chinensis 'Samzam' – Samaritan Chinese dogwood
- Cornus kousa subsp. chinensis 'Ticknor's Choice' – Chinese dogwood
- Cornus kousa 'Elizabeth Lustgarten' – weeping kousa dogwood
- Cornus kousa 'Greensleeves' – kousa dogwood
- Cornus kousa 'Kristin Lipka's Variegated Weeper' – variegated weeping kousa dogwood
- Cornus kousa 'Lustgarten Weeping' – weeping kousa dogwood
- Cornus kousa 'Polizam' – Powdered Lipstick kousa dogwood
- Cornus kousa 'Rutpink' – Scarlet Fire pink kousa dogwood
- Cornus kousa 'Snow Tower' – kousa dogwood
- Cornus kousa 'Summer Gold' – variegated kousa dogwood
- Cornus kousa 'Trinity Star' – variegated kousa dogwood
- Cornus kousa 'White Ball' – kousa dogwood
- Cornus macrophylla – bigleaf dogwood
- Cornus mas 'Aureoelegantissima' – variegated Cornelian cherry
- Cornus mas 'Elegant' – Cornelian cherry
- Cornus mas 'JFS PN4Legacy' – Saffron Sentinel Cornelian cherry
- Cornus mas 'Pioneer' – Cornelian cherry
- Cornus mas 'Ukraine Yellow' – Cornelian cherry
- Cornus mas 'Variegata' – variegated Cornelian cherry
- Cornus mas 'Vidubetskii' – Red Star Cornelian cherry
- Cornus mas (yellow-fruited) – cornelian cherry
- Cornus 'NCCH3'
- Cornus officinalis – Japanese cornel
- Cornus officinalis 'Kintoki' – dwarf Japanese cornel
- Cornus officinalis 'Spring Glow' – cornelian cherry
- Cornus pumila – dwarf redtip dogwood
- Cornus quinquenervis – alder wood
- Cornus 'Rutcan' – Constellation Rutgers hybrid dogwood
- Cornus sanguinea subsp. australis – black sea dogwood
- Cornus sanguinea 'Midwinter Fire' – bloodtwig dogwood
- Cornus sanguinea 'Winter Beauty' – bloodtwig dogwood
- Cornus wilsoniana – Wilson's dogwood
- Cornus wilsoniana 'White Jade' – Wilson's dogwood
- Cortaderia araucana – pampas grass
- Cortaderia selloana 'Aureolineata' – gold-stripe Pampas grass
- Cortaderia selloana 'Blue Bayou' – compact pampas grass
- Cortaderia selloana 'Sunningdale Silver' – Pampas grass
- Corydalis leucanthema 'Silver Spectre' – corydalis
- Corydalis solida 'Beth Evans' – fumewort
- Corydalis solida 'Purple Bird' – fumewort
- Corylopsis – winterhazel
- Corylopsis glabrescens var. gotoana – fragrant winterhazel
- Corylopsis sinensis – Chinese winterhazel
- Corylopsis sinensis var. calvescens f. veitchiana – Veitch's winterhazel
- Corylopsis spicata – spiked winterhazel
- Corylopsis spicata 'Golden Spring' – spiked winterhazel
- Corylopsis willmottiae – Willmott winterhazel
- Corylus avellana 'Aurea' – golden hazelnut
- Corylus avellana 'Burgundy Lace' – purple leaf hazelnut
- Corylus avellana 'Contorta' – Harry Lauder's walkingstick
- Corylus avellana 'Heterophylla' – cutleaf hazelnut
- Corylus avellana 'Red Majestic' – purple contorted hazelnut
- Corylus chinensis – Chinese hazelnut
- Corylus colurna – Turkish hazelnut
- Corylus fargesii – Farges' hazelnut
- Corylus maxima 'Purpurea' – purple-leaf giant filbert
- Coryphantha echinus
- Coryphantha robustispina subsp. scheeri
- Coryphantha sulcata – pineapple cactus
- Coryphantha vogtherriana
- Cosmos atrosanguineus – chocolate cosmos
- Cotinus coggygria 'Ancot' – Golden Spirit golden smokebush
- Cotinus coggygria 'Daydream' – smokebush
- Cotinus coggygria 'MINCOJAU3' – Winecraft Gold smokebush
- Cotoneaster dammeri 'Streib's Findling' – bearberry cotoneaster
- Cotoneaster fangianus – Fang's cotoneaster
- Cotoneaster franchetii – orange cotoneaster
- Cotoneaster hodjingensis
- Cotoneaster lucidus
- Cotoneaster mingkwongensis
- Cotoneaster morrisonensis
- Cotoneaster obscurus – Jude the Obscure cotoneaster
- Cotoneaster ogisui – Ogisu's cotoneaster
- Cotoneaster ×suecicus 'OSUCOT1'
- Crambe maritima – sea kale
- Crataegus columbiana – black hawthorn
- Crataegus spathulata – little-hip hawthorn
- Crinum – crinum lily
- Crinum '9 Stripes' – crinum lily
- Crinum 'Alamo Village' – crinum lily
- Crinum americanum – St. Mark's, FL crinum lily
- Crinum amoenum – crinum lily
- Crinum asiaticum – crinum lily
- Crinum asiaticum var. japonicum – crinum lily
- Crinum ×baconi 'Maurine Spinks' – crinum lily
- Crinum 'Bambino' – crinum lily
- Crinum biflorum (Tchad form) – crinum lily
- Crinum 'Bradley' – crinum lily
- Crinum bulbispermum – Orange river lily
- Crinum bulbispermum 'Aurora Glorialis' – Orange river lily
- Crinum bulbispermum 'Jumbo' – Orange river lily
- Crinum bulbispermum (Namibia form) – Orange river lily
- Crinum buphanoides – crinum lily
- Crinum 'Burgundy' – crinum lily
- Crinum 'Cameo Pink' – crinum lily
- Crinum 'Cecil Houdyshel' – crinum lily
- Crinum 'Claude Davis' – crinum lily
- Crinum ×digweedii – crinum lily
- Crinum ×digweedii 'Mahon' – crinum lily
- Crinum ×digweedii 'Red Flare' – crinum lily
- Crinum ×digweedii 'Stars And Stripes' – crinum-lily
- Crinum (dwarf) – crinum lily
- Crinum ×eboracii 'Twelve Apostles' – crinum-lily
- Crinum 'Elizabeth Traub' – crinum lily
- Crinum 'Ellen Bosanquet' – crinum lily
- Crinum erubescens (Westwego form) – crinum lily
- Crinum 'Faye Hornbuckle' – crinum lily
- Crinum 'Fiesta' – crinum lily
- Crinum firmifolium (Madagascar form) – crinum lily
- Crinum 'Glory' – crinum lily
- Crinum ×gowenii 'Massey's Pride' – crinum lily
- Crinum ×herbertii 'Carnival' – crinum lily
- Crinum ×herbertii 'Caroll Abbott' – crinum lily
- Crinum ×herbertii 'Cecil's Choice' – crinum lily
- Crinum ×herbertii 'Paul Bunyan' – crinum lily
- Crinum ×herbertii (pink keal) – crinum lily
- Crinum ×herbertii (red keel) – crinum lily
- Crinum ×herbertii 'Schreck' – crinum lily
- Crinum ×herbertii (Tuscaloosa form) – crinum lily
- Crinum hildebrandtii – crinum lily
- Crinum 'Improved Peach Blow' – crinum lily
- Crinum 'Infusion' – crinum lily
- Crinum 'J.C. Harvey' – crinum lily
- Crinum 'Jubilee' – crinum lily
- Crinum 'Kim Maureen' – crinum lily
- Crinum 'Kridler Clone' – crinum lily
- Crinum 'Li'l Stinker' – crinum lily
- Crinum 'Lorraine Clark' – crinum lily
- Crinum lugardiae (Namibia form) – crinum lily
- Crinum 'Maiden's Blush' – crinum lily
- Crinum mauritianum – crinum lily
- Crinum 'Mrs. Horace Kennedy' – crinum lily
- Crinum 'Mrs. James Hendry' – crinum lily
- Crinum 'Mystery' – crinum lily
- Crinum ornatum (Cameroon form) – crinum lily
- Crinum 'Peachblow' – crinum lily
- Crinum 'Peyton's Place' – crinum lily
- Crinum 'Pink Flamingo' – crinum lily
- Crinum 'Pink Perfume' – crinum lily
- Crinum 'Pink Trumpet' – crinum lily
- Crinum ×powellii – crinum lily
- Crinum ×powellii 'Kitty Clint' – crinum lily
- Crinum 'Rodger Croker Memorial' – crinum lily
- Crinum 'Sangria' – crinum lily
- Crinum 'Snow White' – crinum lily
- Crinum 'So Sweet' – crinum lily
- Crinum 'Summer Glow' – crinum lily
- Crinum 'Summer Nocturne' – crinum lily
- Crinum 'Super Ellen' – crinum lily
- Crinum 'Walter Flory' – crinum lily
- Crinum 'Wetbigi' – crinum lily
- Crinum 'Wetmini' – crinum lily
- Crinum 'White Queen' – crinum lily
- Crocosmia – Nova Gold Dragon montbretia
- Crocosmia ×crocosmiiflora 'George Davidson' – crocosmia
- Crocosmia ×crocosmiiflora 'Tobias'
- Crocosmia 'Emberglow' – crocosmia
- Crocosmia 'Jenny Bloom' – hybrid crocosmia
- Crocosmia 'Lucifer' – crocosmia
- Crocosmia 'Mistral'
- Crocosmia – Twilight Fairy Crimson compact crocosmia
- Crocus – spring crocus
- Crocus angustifolius – cloth of gold crocus
- Crocus angustifolius 'Cloth of Gold'
- Crocus biflorus 'Miss Vain'
- Crocus cartwrightianus 'Albus' – autumn-blooming crocus
- Crocus chrysanthus 'Advance' – spring crocus
- Crocus chrysanthus 'Blue Pearl' – spring crocus
- Crocus chrysanthus 'Cream Beauty' – spring crocus
- Crocus chrysanthus 'Herald' – spring crocus
- Crocus chrysanthus 'Ladykiller' – spring crocus
- Crocus corsicus – Corsican crocus
- Crocus etruscus 'Zwanenburg' – Tuscan crocus
- Crocus flavus 'Golden Yellow'
- Crocus 'Florane'
- Crocus heuffelianus
- Crocus heuffelianus 'Uklin Strain'
- Crocus imperati 'De Jager' – crocus
- Crocus isauricus 'Spring Beauty'
- Crocus korolkowii 'Black-Eyed Beauty'
- Crocus korolkowii 'Orange Tiger'
- Crocus kosaninii
- Crocus laevigatus
- Crocus 'Major'
- Crocus malyi
- Crocus mathewii
- Crocus minimus
- Crocus niveus (late blooming form) – autumn-flowering crocus
- Crocus ochroleucus – autumn-flowering crocus
- Crocus olivieri subsp. balansae 'Zwanenburg'
- Crocus pulchellus – autumn crocus
- Crocus puringii
- Crocus rujanensis
- Crocus sativus – saffron crocus
- Crocus sieberi 'Firefly' – Sieber's crocus
- Crocus sieberi subsp. sublimis 'Tricolor' – Sieber's crocus
- Crocus speciosus
- Crocus speciosus 'Conqueror'
- Crocus speciosus 'Oxonian'
- Crocus thirkeanus
- Crocus tommasinianus – Tommasini's crocus
- Crocus tommasinianus 'Albus' – Tommasini's crocus
- Crocus tommasinianus 'Barr's Purple' – Tommasini's crocus
- Crocus tommasinianus 'Lilac Beauty' – Tommasini's crocus
- Crocus tommasinianus 'Pictus' – Tommasini's crocus
- Crocus tommasinianus 'Roseus' – Tommasini's crocus
- Crocus tommasinianus 'Ruby Giant' – Tommasini's crocus
- Crocus tommasinianus 'Whitewell Purple' – Tommasini's crocus
- Crocus vernus
- Crocus vernus 'Flower Record'
- Crocus vernus 'King of the Striped'
- Crocus vernus 'Remembrance'
- Crocus vernus 'Vanguard'
- Crocus 'Yalta'
- Croton alabamensis – Alabama croton
- Cryptomeria japonica 'Al's Blue' – Japanese cedar
- Cryptomeria japonica 'Beaumont's Dwarf' – compact Japanese cedar
- Cryptomeria japonica 'Benjamin Franklin' – Japanese cedar
- Cryptomeria japonica 'Birodo Sugi' – dwarf Japanese cedar
- Cryptomeria japonica 'Black Dragon' – compact Japanese cedar
- Cryptomeria japonica 'Butterball' – Japanese cedar
- Cryptomeria japonica 'Ed Woods' – Japanese cedar
- Cryptomeria japonica 'Elegans Nana' – dwarf Japanese cedar
- Cryptomeria japonica 'Giokumo' – Japanese cedar
- Cryptomeria japonica 'Golden Promise' – goldtip dwarf Japanese cedar
- Cryptomeria japonica 'Gyokuryu' – Japanese cedar
- Cryptomeria japonica 'Honeymoon' – Japanese cedar
- Cryptomeria japonica 'Kitakami'
- Cryptomeria japonica 'Kusari-sugi' – Japanese cedar
- Cryptomeria japonica 'Lemonade' – Japanese cedar
- Cryptomeria japonica 'Limeade' – Japanese cedar
- Cryptomeria japonica 'Little Diamond' – dwarf Japanese cedar
- Cryptomeria japonica 'Lobbii' – Japanese cedar
- Cryptomeria japonica 'Magic Dragon' – Japanese cedar
- Cryptomeria japonica 'Monstrosa' – compact Japanese cedar
- Cryptomeria japonica 'Nana' – dwarf Japanese cedar
- Cryptomeria japonica 'Nana Albospica' – variegated Japanese cedar
- Cryptomeria japonica 'Pom Pom' – dwarf Japanese cedar
- Cryptomeria japonica 'Rein's Dense Jade' – dwarf Japanese cedar
- Cryptomeria japonica 'Sekkan' – goldtip Japanese cedar
- Cryptomeria japonica var. sinensis – Chinese cedar
- Cryptomeria japonica 'sPg-3-005' – Dragon Warrior compact Japanese cedar
- Cryptomeria japonica 'Tansu' – dwarf Japanese cedar
- Cryptomeria japonica 'Vilmoriniana Gold' – golden dwarf Japanese cedar
- Cryptomeria japonica 'Winter Green' – Japanese cedar
- Cryptomeria japonica 'Winter Mint' – Japanese cedar
- Cryptomeria japonica 'Yellow Twig' – Japanese cedar
- Cryptomeria japonica 'Yoshino' – Japanese cedar
- Ctenitis subglandulosa
- Cunila origanoides
- Cunninghamia lanceolata 'Chason's Gift' – China-fir
- Cunninghamia lanceolata 'Compacta' – China-fir
- Cunninghamia lanceolata var. konishii – Formosan China-fir
- Cunninghamia lanceolata var. konishii (ABG blue) – Formosan China-fir
- Cunninghamia lanceolata 'Samurai' – blue China-fir
- Cuphea 'Cupver'
- Cuphea cyanea 'Ashevilla' – pink cigar plant
- Cuphea glutinosa – Mexican heather
- Cuphea ignea 'Sugarbells'
- Cuphea melvilla 'David Verity' – giant cigar plant
- Cuphea micropetala – Mexican giant cigar plant
- Cupressus
- Cupressus arizonica – Arizona cypress
- Cupressus arizonica 'Blue Ice' – Arizona cypress
- Cupressus arizonica 'Carolina Sapphire' – Arizona cypress
- Cupressus arizonica 'Limelight' – yellow Arizona cypress
- Cupressus arizonica 'Sapphire Skies' – Arizona cypress
- Cupressus arizonica var. stephensonii (dwarf form) – Cuyamaca cypress
- Cupressus arizonica 'Sulfurea' – yellow Arizona cypress
- Cupressus cashmeriana – Kashmir cypress
- Cupressus darjeelingensis – Benghal cypress
- Cupressus funebris – Chinese weeping cypress
- Cupressus guadalupensis var. forbesii – Tecate cypress
- Cupressus nootkatensis 'Green Arrow' – weeping-column Nootka falsecypress
- Cupressus nootkatensis 'Sparkling Arrow' – weeping Nootka falsecypress
- Cupressus torulosa – Himalayan cypress
- Cupressus vietnamensis – golden Vietnamese cypress
- ×Cuprocyparis leylandii 'Gold Rider Silver' – variegated Leyland cypress
- ×Cuprocyparis leylandii 'Green Spire' – Leyland cypress
- Curcuma petiolata – hidden cone ginger
- Curcuma petiolata 'Emperor' – variegated hidden ginger
- Cyanus cheiranthifolius
- Cycas revoluta – sago palm
- Cyclamen africanum – African cyclamen
- Cyclamen cilicium – hardy cyclamen
- Cyclamen coum – hardy cyclamen
- Cyclamen graecum – Greek cyclamen
- Cyclamen hederifolium – hardy cyclamen
- Cyclamen hederifolium Album Group – white flowered hardy cyclamen
- Cyclamen hederifolium Album Group (Ian White form) – white flowered hardy cyclamen
- Cyclamen hederifolium Album Group (silver leaf) – white flowered hardy cyclamen
- Cyclamen hederifolium Ashwood Nurseries Silver Leaf Group – hardy cyclamen
- Cyclamen hederifolium (Corfu Red) – hardy cyclamen
- Cyclamen hederifolium var. hederifolium f. albiflorum – white flowered hardy cyclamen
- Cyclamen hederifolium (pewter arrowhead form) – hardy cyclamen
- Cyclamen purpurascens – alpine cyclamen
- Cyclamen rohlfsianum – Rohlf's cyclamen
- Cyclamen ×whiteiae – hybrid cyclamen
- Cylindropuntia davisii × C. kleiniae 'Golden Lion'
- Cylindropuntia imbricata var. arborscens 'Inermis' – spineless tree cholla
- Cylindropuntia imbricata 'Mosaic Melody'
- Cylindropuntia imbricata var. viridiflorus – Santa Fe cholla
- Cylindropuntia kleiniae – cholla tree cactus
- Cylindropuntia whipplei 'Snow Leopard' – Whipple cholla
- Cylindropuntia whipplei var. whipplei – Whipple cholla
- Cymbalaria muralis – Kenilworth ivy
- Cymbidium sinense
- Cynanchum ascyrifolium
- Cynara humilis – dwarf artichoke
- Cynara syriaca – wild artichoke
- Cypella coelestis – goblet flower
- Cypella herbertii subsp. brevicristata
- Cyperus albostriatus 'Nanus' – dwarf umbrella plant
- Cyperus albostriatus 'Variegatus' – variegated dwarf umbrella plant
- Cyperus alternifolius – Umbrella Plant
- Cyrilla racemiflora 'Graniteville' – weeping swamp cyrilla
- Cyrilla racemiflora var. parviflora (Franklin, SC) – American cyrilla
- Cyrilla racemiflora 'Tom Patrick' – dwarf titi
- Cyrtomium – holly fern
- Cyrtomium caryotideum – holly fern
- Cyrtomium falcatum 'Butterfieldii' – Butterfield's holly fern
- Cyrtomium falcatum 'Rochfordianum' – Japanese holly fern
- Cyrtomium fortunei 'Ulleung Island' – Fortune's holly fern
- Dactylicapnos macrocapnos – yellow bleeding heart vine
- Dahlia – dahlia
- Dahlia 'Bishop of Canterbury' – garden dahlia
- Dahlia 'Bishop of Llandaff' – garden dahlia
- Dahlia 'Bishop of York' – garden dahlia
- Dahlia 'Bishop's Children'
- Dahlia 'Classic Elise' – garden dahlia
- Dahlia 'Classic Giselle' – garden dahlia
- Dahlia 'Classic Summertime' – garden dahlia
- Dahlia coccinea – garden dahlia
- Dahlia cf. coccinea
- Dahlia – Dalina Maxi Colima garden dahlia
- Dahlia – Dalina Maxi Tampico garden dahlia
- Dahlia (ex. 'Knockout') – garden dahlia
- Dahlia (ex. 'Roxy') – garden dahlia
- Dahlia 'Hawaii'
- Dahlia imperialis – tree dahlia
- Dahlia imperialis (double white) – tree dahlia
- Dahlia 'Joliet' – garden dahlia
- Dahlia 'Knockout' – Mystic Illusion garden dahlia
- Dahlia 'Roodkapje' – garden dahlia
- Dahlia sorensenii
- Dalbergia hupeana – rosewood
- Dalea bicolor var. argyrea
- Danae racemosa – poet's laurel
- Daphne acutiloba
- Daphne 'DapJur01' – Perfume Princess daphne
- Daphne genkwa – lilac daphne
- Daphne genkwa 'John Bieber'
- Daphne odora 'Hewreb' – Rebecca variegated winter daphne
- Daphne odora 'Mae-jima' – variegated winter daphne
- Daphne odora 'Nakafu' – variegated winter daphne
- Daphne odora ('Nakafu' sport) – winter daphne
- Daphne odora 'Shinano Nishiki' – variegated winter daphne
- Daphne ×rossetii
- Daphne ×susannae 'Tage Lundell' – hybrid daphne
- Daphne tangutica – sweet daphne
- Daphne ×transatlantica 'Jim's Pride' – daphne
- Daphniphyllum macropodum – daphniphyllum
- Daphniphyllum pentandrum
- Daphniphyllum teijsmannii 'Mountain Dove' – Japanese daphniphyllum
- Dasylirion berlandieri – blue sotol
- Dasylirion gentryi – Gentry's sotol
- Dasylirion glaucophyllum 'Marbles Park' – blue sotol
- Dasylirion leiophyllum – green sotol
- Dasylirion texanum – Texas sotol
- Datura
- Davallia mariesii 'Korea Rocks' – rabbit's foot fern
- Davidia involucrata 'Aya Nishiki' – variegated dove tree
- Davidia involucrata 'Lady Dahlia' – dove tree
- Deinostigma tamianum
- Delosperma 'Alan's Apricot' – ice plant
- Delosperma ashtonii 'Blut' – hardy ice-plant
- Delosperma cooperi – hardy ice-plant
- Delosperma 'Florsaika'
- Delosperma 'John Proffitt' – Table Mountain ice plant
- Delosperma 'Lavender Ice' – ice plant
- Delosperma 'P001s' – Fire Spinner iceplant
- Delosperma 'PJS01S' – Granita Raspberry hardy ice-plant
- Delosperma (Sani Pass No. 2) – hybrid ice-plant
- Delosperma sutherlandii – Sutherland's hardy ice-plant
- Delosperma 'T18-2' – Ocean Sunset Orange Vibe ice plant
- Delosperma 'T18-5' – Ocean Sunset Violet ice plant
- Dendropanax cf. kwangsiensis
- Dendropanax pellucidopunctatus
- Dendropanax trifidus – tree ivy
- Deparia lobato-crenata
- Deutzia crenata 'Summer Snow' – variegated deutzia
- Deutzia glabrata – smooth deutzia
- Deutzia gracilis – slender deutzia
- Deutzia gracilis 'Duncan' – Chardonnay Pearls slender deutzia
- Deutzia gracilis 'Mincream' – Creme Fraiche variegated slender deutzia
- Deutzia gracilis 'Nikko Dawn' – variegated slender deutzia
- Deutzia gracilis 'Variegata' – variegated deutzia
- Deutzia ×hybrida 'Tourbillon Rouge' – pink deutzia
- Deutzia ×kalmiiflora – Kalmia-flowered deutzia
- Deutzia 'NCDX2' – Yuki Cherry Blossom pink dwarf deutzia
- Deutzia ogatae – deutzia
- Deutzia pulchra – beautiful deutzia
- Deutzia ×rosea 'Nikko Blush' – rose deutzia
- Deutzia rubens – white deutzia
- Deutzia scabra 'Variegata' – variegated fuzzy deutzia
- Deutzia setchuenensis var. corymbiflora – Sichuan deutzia
- Diabelia spathulata – twin-flowering abelia
- Dianella caerulea 'DBB03' – Cassa Blue flax lily
- Dianella caerulea 'John 316'
- Dianella 'DP401' – Clarity Blue dianella
- Dianella aff. ensifolia
- Dianthus – pink
- Dianthus arpadianus var. pumilus – Alpine pink
- Dianthus ×arvernensis
- Dianthus barbatus (red shades)
- Dianthus 'Blue Hills' – Cheddar pinks
- Dianthus callizonus
- Dianthus 'Chris's Passalong' – perennial sweet William
- Dianthus 'Dainty Dame'
- Dianthus deltoides
- Dianthus furcatus 'Bereschei'
- Dianthus giganteiformis subsp. pontederae
- Dianthus gratianopolitanus 'Bath's Pink' – dianthus
- Dianthus henteri
- Dianthus 'Hilbeakate'
- Dianthus 'Hilbeanaom'
- Dianthus hyssopifolius
- Dianthus 'Inshriach Dazzler' – garden pink
- Dianthus 'Key Lime Pie' – American Pie pinks
- Dianthus knappii – yellow carnation
- Dianthus myrtinervius
- Dianthus nitidus – Carpathian glossy pink
- Dianthus oschtenicus – dianthus
- Dianthus pinifolius – pine-leaf pink
- Dianthus plumarius 'Rose Tone' – feathered pink
- Dianthus pygmaeus
- Dianthus seguieri – Sequier's pink
- Dianthus superbus
- Dianthus 'Sweetie Pie'
- Dianthus tianschanicus – Tianshan carnation
- Dianthus 'Uribest52' – Vivid Bright Light dianthus
- Dianthus 'Wp15 Mow08' – Devon Cottage Pinball Wizard pinks
- Dichelostemma congestum – fork-toothed ookow
- Dichelostemma congestum 'Pink Diamond' – fork-toothed ookow
- Dichelostemma ida-maia – firecracker flower
- Dichroa – evergreen hydrangea
- Dichroa (dwarf)
- Dichroa febrifuga 'Yamaguchi Hardy' – blue evergreen hydrangea
- Dichroa febrifuga 'Yamaguchi Narrow-leaf' – blue evergreen hydrangea
- Dichroa febrifuga 'Yamaguchi White' – white evergreen hydrangea
- Dierama adelphicum – wandflower
- Dierama jucundum – wandflower
- Dierama mossii – Compact Angel's Fishing Rod
- Dierama pulcherrimum 'Pink Fairies'
- Diervilla lonicera 'Copper' – copper low bush honeysuckle
- Dietes iridioides – African iris
- Digitalis ciliata – hairy foxglove
- Digitalis ferruginea – rusty foxglove
- Digitalis lutea – straw foxglove
- Digitalis schischkinii – Foxglove
- Digitalis thapsi 'Spanish Peaks' – Spanish foxglove
- Diospyros cathayensis – Cathay persimmon
- Diospyros kaki – oriental persimmon
- Diospyros kaki 'Gwang Yang' – oriental persimmon
- Diospyros kaki 'Shibamichi Weeping' – oriental persimmon
- Diospyros palmeri – persimmon
- Diospyros rhombifolia – princess persimmon
- Diospyros rhombifolia 'Suisei' – princess persimmon
- Diospyros texana – Texas persimmon
- Diospyros virginiana – persimmon
- Diospyros virginiana (Hidden Hollow seedless) – persimmon
- Diospyros virginiana 'JN5' – Magic Fountain weeping persimmon
- Diospyros wilsonii – Wilson's persimmon
- Diplazium wichurae
- Dirca palustris – leatherwood
- Disanthus cercidifolius 'Ena Nishiki' – variegated redbud-hazel
- Disporopsis – evergreen Solomon's seal
- Disporopsis arisanensis – evergreen Solomon's seal
- Disporopsis aff. aspersa – Chinese evergreen Solomon’s seal
- Disporopsis (ex. China)
- Disporopsis jinfushanensis – dwarf evergreen Solomon's seal
- Disporopsis 'Lily Pads' – evergreen Solomon's seal
- Disporopsis longifolia – evergreen Solomon's seal
- Disporopsis luzoniensis – evergreen Solomon's seal
- Disporopsis pernyi – evergreen Solomon's seal
- Disporopsis aff. pernyi – evergreen Solomon's seal
- Disporopsis pernyi 'Xiao Chengdu' – dwarf evergreen Solomon's seal
- Disporopsis (sp. nova)
- Disporopsis undulata – evergreen Solomon's seal
- Disporum
- Disporum cf. bodinieri – fairy bells
- Disporum bodinieri – fairy bells
- Disporum cantoniense 'Aureovariegata' – Canton fairy bells
- Disporum cantoniense 'Blueberry Bere' – Canton fairy bells
- Disporum longistylum 'Green Giant' – Chinese fairy bells
- Disporum longistylum 'Night Heron' – purple-leaf fairy bells
- Disporum longistylum 'Shina-no-tsuki' – China moon Solomon's seal
- Disporum megalanthum – fairy bells
- Disporum sessile 'Awa-no-tsuki' – variegated fairy bells
- Disporum sessile 'Goldbug' – fairy bells
- Disporum sessile 'Konpukurin' – fairy bells
- Disporum sessile 'Ogon' – fairy bells
- Disporum sessile 'Tightwad' – dwarf fairy bells
- Disporum sessile 'Variegatum' – variegated fairy bells
- Disporum smilacinum 'Ki-no-tsukasa' – Japanese fairy bells
- Disporum smilacinum 'Pink Star' – Japanese fairy bells
- Disporum trabeculatum – rigid Solomon's seal
- Disporum trabeculatum 'Nakafu'
- Disporum uniflorum – fairy bells
- Distylium – isu tree
- Distylium buxifolium – box leaf isu tree
- Distylium aff. chinense – isu tree
- Distylium myricoides – blue isu
- Distylium myricoides 'sPg-3-007' – Spring Frost white-flush isu tree
- Distylium 'PIIDIST-I' – Emerald Heights isu tree
- Distylium 'PIIDIST-II' – Blue Cascade isu tree
- Distylium 'PIIDIST-III' – First Editions Coppertone isu tree
- Distylium 'PIIDIST-V' – Cinnamon Girl isu tree
- Distylium racemosum – isu tree
- Distylium racemosum 'Guppy' – dwarf isu tree
- Dracunculus vulgaris – dragon arum
- Dracunculus vulgaris – white form No. 1 dragon arum
- Drimiopsis (Kampersus striped) – striped false hosta
- Drimiopsis maculata – African hosta
- Drimiopsis maculata 'Slow Fade' – hardy drimiopsis
- Dryopteris
- Dryopteris affinis subsp. affinis – scaly male fern
- Dryopteris affinis 'Gotemba Crested' – scaly male fern
- Dryopteris ×australis – Dixie wood fern
- Dryopteris championii – Champion's wood fern
- Dryopteris erythrosora – autumn fern
- Dryopteris erythrosora var. koidzumiana – autumn fern
- Dryopteris erythrosora 'Radiance' – autumn fern
- Dryopteris formosana – Formosa wood fern
- Dryopteris goldiana – Goldie's shield fern
- Dryopteris pycnopteroides – leatherwood fern
- Dryopteris sieboldii – Siebold's wood fern
- Dryopteris sublacera – lacey wood fern
- Duranta erecta 'Cuban Gold'
- Echeandia texensis – Texas craglily
- Echinacea – coneflower
- Echinacea 'Balscawbux'
- Echinacea 'Balscmelux'
- Echinacea 'Balscrasux'
- Echinacea 'Balsomador'
- Echinacea 'Balsomrosa'
- Echinacea 'Berry'
- Echinacea 'Carmine'
- Echinacea 'Conevin' – Purple Fantasy hybrid coneflower
- Echinacea 'Coral'
- Echinacea 'Evan Saul' – Sundown Big Sky™ coneflower
- Echinacea 'Glowing Dream'
- Echinacea pallida – pale purple coneflower
- Echinacea paradoxa – yellow coneflower
- Echinacea purpurea – eastern purple coneflower
- Echinacea purpurea (ex. 'Ruby Giant') – eastern purple coneflower
- Echinacea purpurea 'Merlot' – eastern purple coneflower
- Echinacea simulata – wavy-leaf purple coneflower
- Echinacea 'Spicy'
- Echinocereus bistolii var. pseudopectinatus
- Echinocereus chloranthus var. cylindricus
- Echinocereus chloranthus var. milleri
- Echinocereus coccineus – scarlet hedgehog cactus
- Echinocereus coccineus var. gurneyi
- Echinocereus dasyacanthus
- Echinocereus enneacanthus var. brevispinus
- Echinocereus fendleri – pinkflower hedgehog cactus
- Echinocereus lloydii
- Echinocereus pectinatus var. wenigeri 'Ctenoides'
- Echinocereus reichenbachii – lace hedgehog cactus
- Echinocereus reichenbachii subsp. baileyi – Bailey's hedgehog cactus
- Echinocereus reichenbachii subsp. baileyi × E. perbellus
- Echinocereus reichenbachii subsp. caespitosus
- Echinocereus reichenbachii var. perbellus – lace hedgehog cactus
- Echinocereus ×roetteri – Roetter's hedgehog cactus
- Echinocereus triglochidiatus – claret cup hedgehog cactus
- Echinocereus triglochidiatus (Alpine Texas form) – claret cup hedgehog cactus
- Echinocereus triglochidiatus var. inermis
- Echinocereus triglochidiatus var. inermis × E. triglochidiatus (White Sands)
- Echinocereus viridiflorus – nylon hedgehog cactus
- Echinodorus bracteatus 'Lantau Lady' – Amazon sword
- Echinodorus cordifolius 'Marble Queen' – variegated creeping burrhead
- Echinops maracandicus – globe thistle
- Echinops ritro – small globe thistle
- Echinopsis formosa × (Lobivia bruchii × Echinopsis thelegona)
- Echium vulgare – viper's bugloss
- Echium wildpretii
- Edgeworthia 'Akebono' – red-flowered paperbush
- Edgeworthia chrysantha – golden paperbush
- Edgeworthia chrysantha 'Nanjing Gold' – golden paperbush
- Edgeworthia chrysantha 'Winter Gold' – golden paperbush
- Edgeworthia papyrifera (ex. 'Eco Yaku') – paperbush
- Edgeworthia 'Snow Globe' – hybrid Japanese paperbush
- Edraianthus graminifolius
- Edraianthus parnassicus
- Edraianthus tenuifolius
- Ehretia dicksonii – Dickson's koda tree
- Elaeagnus pungens 'Chirifu' – variegated silverthorn
- Elaeagnus pungens 'Hosoba Fukurin' – variegated silverthorn
- Elaeagnus pungens 'Maculata' – variegated silverthorn
- Elaeagnus viridis var. delavayi
- Elaeagnus yoshinoi
- Elaeocarpus decipiens – Japanese blueberry tree
- Eleutherococcus nodiflorus
- Eleutherococcus sieboldianus 'Variegatus' – variegated five-leaf aralia
- Ellisiophyllum pinnatum – Taiwan starflower
- Elodea canadensis
- Elsholtzia stauntonii – mint shrub
- Embelia vestita – sour vine
- Emmenopterys henryi – Chinese Emmenopterys
- Encephalartos kisambo
- Encephalartos transvenosus – Modjadi cycad
- Enkianthus campanulatus var. longilobus – redvein enkianthus
- Enkianthus campanulatus 'Summer Hill' – redvein enkianthus
- Enkianthus chinensis
- Enkianthus perulatus 'Tsukumo' – white enkianthus
- Enkianthus quinqueflorus – Chinese new year flower
- Ephedra chilensis – jointfir
- Ephedra equisetina – blue stem joint fir
- Ephedra fedtschenkoae – joint fir
- Ephedra major – jointfir
- Ephedra regeliana
- Ephedra sinica – ephedra
- Epimedium – fairy wings
- Epimedium cf. acuminatum – fairy wings
- Epimedium 'Amber Queen' – fairy wings
- Epimedium 'Atlas' – fairy wings
- Epimedium davidii (DJHC 681) – fairy wings
- Epimedium 'Domino' – fairy wings
- Epimedium grandiflorum 'Conalba' – Alabaster fairy wings
- Epimedium grandiflorum 'Purple Pixie' – fairy wings
- Epimedium ogisui (DJHC 733) – fairy wings
- Epimedium ×perralchicum 'Frohnleiten' – fairy wings
- Epimedium 'Pretty in Pink' – fairy wings
- Epimedium pubescens – fairy wings
- Epimedium rhizomatosum – fairy wings
- Epimedium sempervirens 'Okuda's White' – fairy wings
- Epimedium sempervirens 'Snowshoe Lake' – fairy wings
- Epimedium 'Songbirds' – fairy wings
- Epimedium stellulatum – star-shaped fairy wings
- Epimedium 'The Giant' – fairy wings
- Epimedium ×versicolor 'Strawberry Blush' – pink fairy wings
- Epimedium ×versicolor 'Sulphureum' – yellow fairy wings
- Epimedium ×warleyense – fairy wings
- Epimedium wushanense – fairy wings
- Epimedium ×youngianum 'Niveum' – snowy fairy wings
- Epimedium ×youngianum 'Royal Flush' – fairy wings
- Eragrostis elliottii – Elliott's love grass
- Eragrostis spectabilis – purple love grass
- Eranthis cilicica – winter aconite
- Eranthis hyemalis – winter aconite
- Eremurus 'Lemon Meringue' – foxtail lily
- Erica ×darleyensis 'Furzey' – Darley heath
- Erica ×darleyensis 'White Perfection' – Darley heath
- Erica (not white flower)
- Erica (white flower)
- Erigeron pulchellus var. pulchellus 'Lynnhaven Carpet' – robin's plantain
- Eriobotrya japonica 'Coppertone' – loquat
- Eriobotrya japonica (white splash) – variegated loquat
- Eriobotrya japonica 'Wuling Hardy' – loquat
- Eryngium alpinum – blue star
- Eryngium aquaticum – eryngo
- Eryngium aquaticum var. ravenellii – rattlesnake master
- Eryngium eburneum – sea holly
- Eryngium palmatum – sea holly
- Eryngium pandanifolium – giant sea holly
- Eryngium planum – flat sea holly
- Eryngium planum 'Blue Glitter' – sea holly
- Eryngium regnellii – sea buckthorn
- Eryngium serra – sharp sea holly
- Eryngium venustum – Mexican sea holly
- Eryngium yuccifolium – rattlesnake master
- Erysimum 'Er 07 3-10'
- Erysimum 'G16-227'
- Erysimum jugicola
- Erysimum witmannii – wallflower
- Erythranthe lutea
- Erythrina ×bidwillii – coralbean hybrid
- Erythrina crista-galli 'Compacta' – cockspur coral tree
- Erythrina herbacea – coral bean
- Erythronium 'Pagoda' – hybrid dogtooth violet
- Escallonia 'Iveyi'
- Eschscholzia californica 'Golden West'
- Escobaria albicolumnaria – common foxtail cactus
- Escobaria dasyacantha
- Escobaria deserti
- Escobaria guadalupensis
- Escobaria missouriensis – Missouri foxtail cactus
- Escobaria missouriensis subsp. asperispina
- Escobaria sneedii
- Escobaria sneedii subsp. leei (yellow flower)
- Escobaria vivipara var. neomexicana
- Eucalyptus amplifolia – cabbage gum
- Eucalyptus camphora – swamp gum
- Eucomis – pineapple lily
- Eucomis 'African Night' – pineapple lily
- Eucomis autumnalis – pineapple lily
- Eucomis autumnalis subsp. clavata – pineapple lily
- Eucomis bicolor – pineapple lily
- Eucomis comosa – pineapple lily
- Eucomis comosa 'Peace Candles' – pineapple lily
- Eucomis comosa 'Sparkling Burgundy' – purple-leaf pineapple lily
- Eucomis 'Dark Star' – pineapple lily
- Eucomis (ex. 'Reuben') – pineapple lily
- Eucomis 'Glow Sticks' – pineapple lily
- Eucomis 'Johannesburg' – pineapple lily
- Eucomis 'Leia' – pineapple lily
- Eucomis 'Mini Tuft Bright Pink' – dwarf pink pineapple lily
- Eucomis pole-evansii – Transvaal pineapple lily
- Eucomis 'Reuben' – pineapple lily
- Eucomis 'Safari Adventure' – pineapple lily
- Eucomis 'Smoking Joe' – pineapple lily
- Eucomis 'Tugela Gem' – pineapple lily
- Eucomis 'Tugela Jade' – hybrid pineapple lily
- Euonymus – Vietnamese euonymus
- Euonymus alatus 'Select' – Fireball burning bush
- Euonymus americanus 'Narrowleaf' – narrowleaf hearts-a-bursting
- Euonymus bungeanus – winterberry euonymus
- Euonymus carnosus – fleshy-flowered spindletree
- Euonymus europaeus 'Red Cascade' – European spindle
- Euonymus fortunei 'Harlequin' – wintercreeper euonymus
- Euonymus fortunei 'Interbolwji' – Blondy wintercreeper euonymus
- Euonymus fortunei 'Wolong Ghost' – silvervein wintercreeper euonymus
- Euonymus grandiflorus
- Euonymus lanceolatus
- Euonymus nitidus – Chinese spindletree
- Euonymus oxyphyllus – Korean spindle tree
- Euonymus cf. spraguei – Sprague's euonymus -- MWT14-988
- Eupatorium 'Phantom'
- Euphorbia
- Euphorbia amygdaloides var. robbiae – Mrs. Robb's bonnet
- Euphorbia 'Canyon Gold' – spurge
- Euphorbia clavarioides
- Euphorbia corollata 'Carolina Snow' – flowering spurge
- Euphorbia 'Dean's Hybrid' – Dean's spurge
- Euphorbia lathyris
- Euphorbia ×martinii 'Ascot Rainbow' – variegated wood spurge
- Euphorbia rigida – rigid spurge
- Euptelea polyandra – Fusakazura
- Eurya alata
- Eurya japonica – eurya
- Eurya japonica 'Ginyo Hisakaki' – variegated hisakaki
- Eurya japonica 'Golden Spreader' – golden eurya
- Eurya japonica 'Moutiers' – variegated eurya
- Eurya leptophylla
- Eurya aff. leptophylla – Taiwanese eurya
- Eurybia divaricata – white wood aster
- Eurybia mirabilis
- Euscaphis japonica – sweetheart tree
- Eustrephus latifolius – wombat berry
- Eutrochium purpureum 'Big Umbrella' – Joe-Pye weed
- Eutrochium (white)
- Evolvulus sericeus
- Exbucklandia populnea – Malayan aspen
- Exbucklandia tonkinensis
- Exochorda 'Blizzard' – Snow Day pearlbush
- Exochorda ×macrantha 'Bailmoon'
- Eysenhardtia orthocarpa – kidneywood
- Eysenhardtia orthocarpa (Cochise County) – kidneywood
- Fagus grandifolia – American beech
- Fagus grandifolia (Bill Barnes dwarf) – American beech
- Fagus grandifolia 'White Lightning' – dwarf weeping American beech
- Fagus hayatae – Taiwan beech
- Fagus lucida – shining beech
- Fagus sylvatica 'Faux de Verzy' – dwarf beech
- Fagus sylvatica 'Rohan Minaret' – columnar purple European beech
- Fallugia paradoxa – Apache plume
- Farfugium japonicum – leopard plant
- Farfugium japonicum 'Aureomaculatum' – spotted leopard plant
- Farfugium japonicum var. formosanum – leopard plant
- Farfugium japonicum var. formosanum 'Green Teeth' – leopard plant
- Farfugium japonicum 'Shishi Botan' – parsley leafed leopard plant
- Farfugium japonicum 'Yaezaki' – leopard plant
- Farfugium 'Last Dance' – leopard plant
- Fargesia rufa – clumping bamboo
- Fargesia rufa 'Oprins Selection' – Green Panda clumping bamboo
- Fargesia rufa 'Sunset Glow' – clumping bamboo
- ×Fatshedera lizei 'Angyo Star' – variegated tree ivy
- ×Fatshedera lizei 'Curly' – curlyleaf variegated fatshedera
- ×Fatshedera lizei 'Pia' – variegated tree ivy
- Fatsia japonica – Japanese fatsia
- Fatsia japonica (ex. 'Sparky') – Japanese fatsia
- Fatsia japonica 'Murakumo Nishiki' – cloud brocade Japanese fatsia
- Fatsia japonica 'Sparky' – Japanese aralia
- Fatsia japonica (USNA 25117 or 45117J?) – Japanese fatsia
- Fatsia japonica 'Variegata' – variegated Japanese fatsia
- Fatsia polycarpa (Shitou giant form) – Taiwan fatsia
- Fendlera wrightii – Wright's fendlerbush
- Fessia greilhuberi
- Ficaria verna 'Coppernob' – fig buttercup
- Ficaria verna 'Double Mud'
- Ficaria verna Flore Pleno Group – double-flowered fig buttercup
- Ficus
- Ficus carica 'Chicago Hardy' – edible fig
- Ficus carica 'Conadria' – edible fig
- Ficus carica 'Jolly Tiger' – edible fig
- Ficus carica 'Majoam' – Little Miss Figgy edible fig
- Ficus carica 'Mission' – edible fig
- Ficus carica 'Panachee' – edible fig
- Ficus carica 'Santa Cruz Dark' – edible fig
- Ficus carica 'UCR 347-1' – caprifig
- Ficus carica 'Violette de Bordeaux' – edible fig
- Ficus gasparriniana var. laceratifolia – Christmas fig
- Ficus johannis subsp. afghanistanica 'Silver Lyre' – Afghan fig
- Ficus palmata – Punjab fig
- Ficus pumila 'Quercifolia' – oak leaf creeping fig
- Ficus pumila 'Variegata' – creeping fig
- Firmiana simplex – Chinese parasol tree
- Flueggea suffruticosa – fountain hardhack
- Foeniculum vulgare 'Rubrum' – bronze fennel
- Forestiera angustifolia 'Woodlander's Weeping' – desert olive
- Forestiera pubescens var. parvifolia – desert olive
- Forsythia – forsythia
- Forsythia 'Courtacour' – Goldilocks forsythia
- Forsythia 'Courtasol' – Gold Tide forsythia
- Forsythia giraldiana 'Golden Times' – gold-margined early forsythia
- Forsythia ×intermedia 'Courdijau' – Golden Peep dwarf forsythia
- Forsythia ×intermedia 'White Gold' – variegated forsythia
- Forsythia koreana 'Kumson' – Korean forsythia
- Forsythia mandshurica 'Vermont Sun' – Manchurian forsythia
- Forsythia 'New Hampshire Gold' – dwarf forsythia
- Forsythia viridissima 'McKCitrine' – Citrus Swizzle variegated forsythia
- Fortunearia sinensis
- Fothergilla gardenii 'Chattanooga' – dwarf fothergilla
- Fothergilla gardenii 'Suzanne' – dwarf fothergilla
- Fothergilla ×intermedia 'Mount Airy' – fothergilla
- Fothergilla ×intermedia 'Red Licorice' – witch-alder
- Fothergilla milleri – Miller's witch alder
- Fothergilla 'Redneck Nation' – fothergilla
- Fragaria chiloensis – beach strawberry
- Fragaria 'Lipstick' – strawberry
- Fraxinus
- Fraxinus angustifolia subsp. oxycarpa – desert ash
- Fraxinus excelsior 'Aureafolia' – Golden Desert gold-twig European ash
- Fraxinus greggii – littleleaf ash
- Fraxinus insularis – Chinese flowering ash
- Fraxinus lanuginosa – Japanese ash
- Fraxinus ornus – flowering ash
- Fraxinus pennsylvanica 'Centerpoint' – green ash
- Fraxinus quadrangulata – blue ash
- Fraxinus sieboldiana – Japanese flowering ash
- Fraxinus sieboldiana 'Rising Sun' – Japanese flowering ash
- Freesia laxa
- Fritillaria meleagris (ex. 'Aphrodite')
- Fritillaria meleagris (mixed)
- Fritillaria persica
- Fritillaria uva-vulpis
- Fritillaria verticillata
- Fuchsia hatschbachii – Hatschbach's fuchsia
- Fuchsia 'Sanihanf' – Angel Earrings Cascading hardy cascading fuchsia
- Fuchsia ('Sanihanf' ex)
- Gaillardia aestivalis 'Glitz 'n Glamour' – yellow lanceleaf blanketflower
- Gaillardia aestivalis var. winkleri – Texas firewheel
- Gaillardia aestivalis var. winkleri 'Grape Sensation' – purple Texas firewheel
- Galanthus 'Bertram Anderson' – snowdrop
- Galanthus 'Curly' – snowdrop
- Galanthus elwesii – snowdrop
- Galanthus elwesii 'Cedric's Prolific' – snowdrop
- Galanthus elwesii var. monostictus – one-spotted giant snowdrop
- Galanthus 'Fiona's Gold' – snowdrop
- Galanthus gracilis
- Galanthus (Greatorex double) – snowdrop
- Galanthus 'Heffalump' – snowdrop
- Galanthus 'Homersfield' – snowdrop
- Galanthus krasnovii
- Galanthus nivalis
- Galanthus nivalis 'Flore Pleno'
- Galanthus nivalis 'Magnet' – snowdrop
- Galanthus nivalis 'Viridi-apice'
- Galanthus nivalis 'Warei'
- Galanthus plicatus subsp. byzantinus 'Three Ships' – Turkish snowdrop
- Galanthus plicatus 'Wandlebury Ring' – snowdrop
- Galanthus plicatus 'Wendy's Gold' – snowdrop
- Galanthus reginae-olgae – Queen Olga's snowdrop
- Galanthus reginae-olgae (John Lonsdale seedling)
- Galanthus reginae-olgae (Judith Tyler long pedicel)
- Galanthus 'Sam Arnott' – snowdrop
- Galanthus samothracicus
- Galanthus 'Wasp' – snowdrop
- Galanthus woronowii – giant snowdrop
- Galanthus (yellow edge) – snowdrop
- Galtonia candicans
- Gardenia '4Bellacj01' – Swan Maiden Cape jasmine
- Gardenia jasminoides – Cape jasmine
- Gardenia jasminoides 'Buttons' – compact Cape jasmine
- Gardenia jasminoides 'Chuck Hayes' – Cape jasmine
- Gardenia jasminoides 'Crown Jewel' – Cape jasmine
- Gardenia jasminoides 'Cutie Pie' – Cape jasmine
- Gardenia jasminoides 'Kaleidoscope' – Cape jasmine
- Gardenia jasminoides 'Kleim's Hardy' – Cape jasmine
- Gardenia jasminoides 'Leeone' – Jubilation Cape jasmine
- Gardenia jasminoides 'Lynn Lowrey' – Cape jasmine
- Gardenia jasminoides 'Madga 1' – Heaven Scent cape jasmine
- Gardenia jasminoides 'Ogon-no-hana' – Gold Doubloon gold-leaf Cape jasmine
- Gardenia jasminoides 'SMNGDUO'
- Gardenia jasminoides (variegated, double flower) – variegated Cape jasmine
- Gardenia jasminoides (variegated, single flower) – variegated Cape jasmine
- Gardenia jasminoides (variegated, single flower No. 2) – Cape jasmine
- Gardenia jasminoides 'White Gem' – Cape jasmine
- Gardenia 'PS-2013-3' – Sweetheart Cape jasmine
- Gardenia 'PS-2013-4' – Celestial Star Cape jasmine
- Gaultheria pyroloides – wintergreen
- Gaura lindheimeri 'KLEGL14844' – Belleza White beeblossom
- Gaura lindheimeri 'Little Janie' – wand flower
- Gaura lindheimeri 'Sparkle White' – wand flower
- Gaura lindheimeri
- Gaura lindheimeri 'Walsilfou' – Walberton's Silver Fountain variegated wand flower
- Gelasine elongata – dimpled iris
- Gelsemium sempervirens 'Pride of Augusta' – double Carolina jessamine
- Gentiana linearis
- Gentiana paradoxa
- Geranium ×cantabrigiense 'ABPP' – Crystal Rose cranesbill
- Geranium ×cantabrigiense 'Karmina' – cranesbill
- Geranium macrorrhizum 'Bevan's Variety'
- Geranium macrorrhizum 'Spessart' – cranesbill
- Geranium maculatum 'Espresso' – cranesbill
- Geranium ×oxonianum – hardy geranium
- Geranium ×oxonianum 'Claridge Druce' – cranesbill hardy geranium
- Geranium phaeum 'Samobor' – dusky cranesbill
- Geranium pratense 'Boom Chocolatta' – cranesbill
- Geranium sanguineum 'Album' – bloody cranesbill
- Geranium sanguineum 'Glenluce' – bloody cranesbill
- Geranium sanguineum 'Max Frei' – bloody cranesbill
- Geranium sanguineum 'Pink Pouffe' (Jolly Jewel series) – bloody cranesbill
- Geranium sanguineum – Vision Violet bloody cranesbill
- Geranium 'Tiny Monster' – hardy geranium
- Geranium tuberosum
- Geranium versicolor
- Gerbera – Garvinea Sweet Dreams Gerber daisy
- Ginkgo biloba – maidenhair tree
- Ginkgo biloba 'Aquatorium' – maidenhair tree
- Ginkgo biloba 'Blagon' – Goldspire maidenhair tree
- Ginkgo biloba 'Gnome' – dwarf maidenhair tree
- Ginkgo biloba 'Jagged Jade' – dwarf maidenhair tree
- Ginkgo biloba 'Jehoshaphat' – maidenhair tree
- Ginkgo biloba 'JN9' – Sky Tower maidenhair tree
- Ginkgo biloba 'Majestic Butterfly' – variegated maidenhair tree
- Ginkgo biloba 'Mariken' – dwarf maidenhair tree
- Ginkgo biloba 'Mayfield' – columnar maidenhair tree
- Ginkgo biloba 'Munchkin' – maidenhair tree
- Ginkgo biloba 'Pendula' – pendulous maidenhair tree
- Ginkgo biloba 'Robbie's Twist' – contorted leaf maidenhair tree
- Ginkgo biloba 'Ross Moore' – weeping maidenhair tree
- Ginkgo biloba 'Saratoga' – fishtail maidenhair tree
- Ginkgo biloba 'Spring Grove WB87' – dwarf maidenhair tree
- Ginkgo biloba 'Sunstream' – maidenhair tree
- Ginkgo biloba 'Troll' – compact maidenhair tree
- Ginkgo biloba 'Tschi Tschi' – maidenhair tree
- Ginkgo biloba 'Weeping Wonder' – weeping maidenhair tree
- Ginkgo biloba 'White Lightning' – maidenhair tree
- Gladiolus 'Atomic'
- Gladiolus communis – gladiolus
- Gladiolus dalenii 'Bolivian Peach' – African gladiolus
- Gladiolus dalenii 'Halloweenie' – African gladiolus
- Gladiolus 'Flevo Amico'
- Gladiolus 'Flevo Jive'
- Gladiolus 'Flevo Junior' – hybrid gladiolus
- Gladiolus 'Flevo Kosmic' – hybrid gladiolus
- Gladiolus ×gandavensis – hybrid gladiolus
- Gladiolus ×gandavensis 'Boone' – hybrid gladiolus
- Gladiolus 'Las Vegas'
- Gladiolus nanus 'Halley'
- Gladiolus papilio – butterfly gladiolus
- Gladiolus saundersii – gladiola
- Gladiolus 'Zizane'
- Glandularia '2305C-54'
- Glandularia canadensis – rose verbena
- Glandularia canadensis (white) – rose verbena
- Glandularia – Empress Sun White Blush verbena
- Glandulicactus uncinatus
- Gleditsia japonica var. koraiensis – Korean honey locust
- Gleditsia triacanthos f. inermis 'Draves' – Street Keeper thornless honey locust
- Gleditsia triacanthos 'JFS GMorgenson1' – Northern Sentinel honey locust
- Globba clarkei
- Globularia bisnagarica
- Globularia cordifolia – globe daisy
- Globularia pseudo-nana
- Globularia valentina
- Gloriosa superba – gloriosa lily
- Gloriosa superba 'Rothschildiana' – gloriosa lily
- Gomphostigma virgatum
- Gordonia axillaris 'Shibamichi Select' – fried egg tree
- Gorgonidium intermedium
- Grevillea australis – spider flower
- Gymnocalycium andreae
- Gymnocalycium bruchii var. albispinum
- Gymnocalycium deeszianum – barrel cactus
- Gymnocladus dioicus 'Kentucky Colonel' – Kentucky coffeetree
- Gypsophila patrinii
- Habranthus – hybrid rain-lily
- Habranthus 'Candy Cane'
- Habranthus ×floryi (purple base) – hybrid rain-lily
- Habranthus gracilifolius
- Habranthus martinezii
- Habranthus 'Pink Flamingos' – hybrid rain-lily
- Habranthus robustus – rain-lily
- Habranthus robustus 'Russell Manning' – rain-lily
- Habranthus tubispathus var. texanus – copper lily
- Hakonechloa macra 'All Gold' – Japanese forest grass
- Halesia diptera – two-winged silverbell
- Halesia diptera var. magniflora – two-winged silverbell
- Hamamelis 'Feuerzauber' – witch hazel
- Hamamelis ×intermedia 'Antonieta' – witch hazel
- Hamamelis ×intermedia 'Barbara' – witchhazel
- Hamamelis ×intermedia 'Basma' – witchhazel
- Hamamelis ×intermedia 'Candlelight Vigil' – witchhazel
- Hamamelis ×intermedia 'Doerak' – witch hazel
- Hamamelis ×intermedia 'Jelena' – copper-flowered witch hazel
- Hamamelis ×intermedia 'Orange Peel' – witch hazel
- Hamamelis ×intermedia 'Rubinstar' – witch hazel
- Hamamelis ×intermedia 'Sweet Sunshine' – witch hazel
- Hamamelis ×intermedia 'Tsukuba no Kurenai' – witch hazel
- Hamamelis japonica 'Little Yamaguchi' – dwarf Japanese witch hazel
- Hamamelis mollis 'Early Bright' – Chinese witch hazel
- Hamamelis ovalis – running witch hazel
- Hamamelis vernalis – Ozark witch hazel
- Hamamelis vernalis 'Blue Moon' – Ozark witch hazel
- Hamamelis vernalis 'Burmazam' – Burndt Mahogany witch hazel
- Hamamelis vernalis 'Christmas Cheer' – Ozark witch hazel
- Hamamelis vernalis 'Goleczam' – Golden Eclipse witchhazel
- Hamamelis vernalis 'Klmnineteen' – Autumn Embers Ozark witch hazel
- Hamamelis vernalis 'Quasimodo' – dwarf Ozark witch hazel
- Hamamelis vernalis 'Squib' – witch hazel
- Hamamelis virginiana 'Green Thumb' – variegated common witch hazel
- Hamamelis virginiana 'Harvest Moon' – common witch hazel
- Hamamelis virginiana var. henryae – small-leaved witch hazel
- Hamamelis virginiana 'Ice Queen' – witchhazel
- Hamamelis virginiana 'Little Prospect' – common witch hazel
- Hamamelis virginiana var. mexicana – Mexican witch hazel
- Harperocallis flava – Harper's beauty
- Hedera canariensis 'Variegata'
- Hedera colchica – Persian ivy
- Hedera colchica (adult form) – adult Persian ivy
- Hedera colchica 'Dentata' (adult form) – Persian ivy
- Hedera colchica 'Green Spice' (adult form) – Persian ivy
- Hedera colchica 'Sulphur Heart' – Persian ivy
- Hedera helix – Arborescens Golden Form adult English ivy
- Hedera helix 'Glacier' – variegated English ivy
- Hedera helix 'Glacier' (adult form) – variegated adult English ivy
- Hedera helix 'Gold Heart' (Adult) – English ivy
- Hedera helix 'Lexington Gardens' – adult English ivy
- Hedera helix 'Prince Avenue' (adult form) – adult English ivy
- Hedera helix 'Treetop' – English ivy
- Hedera helix 'Treetop' (adult form) – English ivy
- Hedera nepalensis
- Hedera pastuchovii (adult form) – Russian ivy
- Hedera rhombea 'Creme de Menthe' – variegated adult Japanese ivy
- Hedera rhombea 'Korean Dwarf' – Japanese ivy
- Hedera rhombea 'Ryukyu Island' – Japanese ivy
- Hedychium 'Betty Hodge' – hardy ginger lily
- Hedychium coccineum – red ginger lily
- Hedychium coccineum 'Disney' – red ginger lily
- Hedychium coronarium – butterfly ginger lily
- Hedychium 'Daniel Weeks' – hardy ginger lily
- Hedychium deceptum – red ginger lily
- Hedychium 'Dr. Moy' – variegated ginger lily
- Hedychium (dwarf orange) – ginger lily
- Hedychium 'Elizabeth' – ginger lily
- Hedychium (ex. 'Slim's Orange') – ginger lily
- Hedychium gardnerianum 'Extendum' – kahili ginger
- Hedychium aff. gardnerianum (Hinkley Arunachal Pradesh 2018) – kahili ginger
- Hedychium gardnerianum 'Tara' – kahili ginger
- Hedychium 'Gold Flame' – hardy ginger lily
- Hedychium 'Golden Butterfly' – ginger lily
- Hedychium 'Hawaiian Pink' – ginger lily
- Hedychium ×kewense – ginger lily
- Hedychium 'Kinkaku' – ginger lily
- Hedychium maximum – ginger lily
- Hedychium 'Molten Gold' – ginger lily
- Hedychium 'Moy Giant' – ginger lily
- Hedychium 'Peach Delight' – ginger lily
- Hedychium 'Pink Princess' – ginger lily
- Hedychium 'Pink Sparks' – ginger lily
- Hedychium 'Pink V' – ginger lily
- Hedychium 'Sherry Baby' – ginger lily
- Hedychium 'Slim's Orange' – hardy ginger lily
- Hedychium 'Tai Conch Pink' – ginger lily
- Hedychium 'Tai Emperor' – pink ginger lily
- Hedychium 'Tai Golden Goddess' – ginger lily
- Hedychium 'Tai Savannah' – ginger lily
- Hedychium aff. tengchongense – ginger lily
- Hedychium thyrsiforme × H. maximum – ginger lily
- Hedychium 'Vanilla Ice' – variegated ginger lily
- Hedychium 'White Starburst' – ginger lily
- Heimia salicifolia – shrubby yellowcrest
- Helianthella quinquenervis
- Helianthus angustifolius – swamp sunflower
- Helianthus heterophyllus – variableleaf sunflower
- Helianthus simulans – swamp sunflower
- Heliopsis helianthoides 'Prairie Sunset' – oxeye sunflower
- Heliotropium amplexicaule – clasping heliotrope
- Heliotropium 'WNHPAULAV'
- Helleborus – hellebore
- Helleborus 'ABCRD01' – Penny's Pink lenten rose
- Helleborus 'Abcrd02' – Frostkiss Anna's Red lenten rose
- Helleborus argutifolius – Corsican hellebore
- Helleborus atrorubens
- Helleborus ×ballardiae 'Coseh 720' – Spring Party hybrid hellebore
- Helleborus ×ballardiae 'Coseh 810' – HGC Merlin hybrid hellebore
- Helleborus ×ballardiae 'Raulston Remembered' – hybrid hellebore
- Helleborus bocconei
- Helleborus croaticus – Croatian hellebore
- Helleborus croaticus 'Bells of the Ball'
- Helleborus 'Epb 20'
- Helleborus 'Epb 29' – Frostkiss Dorothy's Dawn hybrid hellebore
- Helleborus 'Epb 30' – Frostkiss Dana's Dulcet hybrid hellebore
- Helleborus ×ericsmithii – hellebore
- Helleborus ×ericsmithii 'Coseh 790' – HGC Shooting Star hybrid hellebore
- Helleborus ×ericsmithii 'Pirouette' – hybrid hellebore
- Helleborus ×ericsmithii 'Winter Moonbeam' – hybrid hellebore
- Helleborus ×ericsmithii 'Winter Sunshine' – hybrid hellebore
- Helleborus foetidus – bear's foot hellebore
- Helleborus foetidus 'Piccadilly' – bear's foot hellebore
- Helleborus foetidus 'Pontarlier' – bear's foot hellebore
- Helleborus ×glandorfensis 'Coseh 4100' – HGC Ice 'N Roses Red hybrid hellebore
- Helleborus ×glandorfensis 'Coseh 4500' – HGC Ice N' Roses White hybrid hellebore
- Helleborus ×glandorfensis 'COSEH 5000' – Ice N' Roses Picotee hybrid hellebore
- Helleborus ×glandorfensis 'COSEH 5100' – Ice N' Roses Dark Picotee hybrid hellebore
- Helleborus ×glandorfensis 'Coseh 5400' – Ice N' Roses Rosado lenten rose
- Helleborus ×glandorfensis – HGC Ice N' Roses Rose hybrid hellebore
- Helleborus ×hybridus – Lenten rose
- Helleborus ×hybridus (Ashwood Garden hybrids) – Lenten rose
- Helleborus ×hybridus (best yellow)
- Helleborus ×hybridus 'Cattleya Semline'
- Helleborus ×hybridus (dark pink shades) – Lenten rose
- Helleborus ×hybridus (double flower) – double Lenten rose
- Helleborus ×hybridus 'Golden Sunrise' – Winter Jewels hybrid hellebore
- Helleborus ×hybridus × H. multifidus subsp. hercegovinus
- Helleborus ×hybridus (mid-pink shades) – Lenten rose
- Helleborus ×hybridus (pale pink shades) – Lenten rose
- Helleborus ×hybridus 'Pamina' – apricot Lenten rose
- Helleborus ×hybridus 'Peppermint Ice' – Winter Jewels hybrid hellebore
- Helleborus ×hybridus 'Red Lady' – Lenten rose
- Helleborus ×hybridus (Royal Heritage strain) – hybrid hellebore
- Helleborus ×hybridus 'Snow Queen' – white Lenten rose
- Helleborus ×hybridus (variegated) – variegated Lenten rose
- Helleborus liguricus – hellebore
- Helleborus niger – Christmas rose
- Helleborus ×nigercors 'Honeyhill Joy' – christmas rose
- Helleborus odorus – fragrant hellebore
- Helleborus 'Rd09'
- Helleborus 'Rio Carnival' – Honeymoon hellebore
- Helleborus ×sternii – Stern's hybrid hellebore
- Helleborus ×sternii (Montrose strain) – Stern's hybrid hellebore
- Helleborus torquatus – collared hellebore
- Helleborus viridis – green hellebore
- Helwingia chinensis var. crenata
- Helwingia chinensis 'Raulston King'
- Helwingia japonica – Japanese helwingia
- Helwingia japonica var. japonica – Japanese helwingia
- Helwingia omeiensis – Mt. Emei helwingia
- Hemerocallis – daylily
- Hemerocallis altissima 'Flyover' – night-blooming daylily
- Hemerocallis – Apricot Towers daylily
- Hemerocallis 'Autumn Minaret' – daylily
- Hemerocallis 'Autumn Pioneer' – daylily
- Hemerocallis 'Autumn Prince' – daylily
- Hemerocallis – aff. 'Berwyn' daylily
- Hemerocallis 'Bitsy' – daylily
- Hemerocallis 'Black Arrowhead' – daylily
- Hemerocallis 'Calypso' – daylily
- Hemerocallis 'Challenger' – daylily
- Hemerocallis citrina – daylily
- Hemerocallis 'Colonel Southall' – daylily
- Hemerocallis 'Cosmic Struggle' – daylily
- Hemerocallis 'Darrow' – daylily
- Hemerocallis 'Evening Gown' – daylily
- Hemerocallis fulva – orange daylily
- Hemerocallis 'Going Bananas' – daylily
- Hemerocallis 'Hint of Blue' – daylily
- Hemerocallis 'Jordan's Jazz' – daylily
- Hemerocallis 'Lady Fingers' – daylily
- Hemerocallis 'Leebea Orange Crush' – daylily
- Hemerocallis 'Lil' Red Wagon' – daylily
- Hemerocallis littorea – coastal daylily
- Hemerocallis nana – daylily
- Hemerocallis 'Neon Flamingo' – daylily
- Hemerocallis 'Nona's Garnet Spider' – daylily
- Hemerocallis 'Nosferatu' – daylily
- Hemerocallis 'Penny's Worth' – daylily
- Hemerocallis 'Primal Scream' – daylily
- Hemerocallis 'Pterodactyl Eye' – daylily
- Hemerocallis 'Purity' – daylily
- Hemerocallis 'Ruby Spider' – daylily
- Hemerocallis 'Shelby's' – daylily
- Hemerocallis 'Siloam Peony Display' – daylily
- Hemerocallis 'South Seas' – daylily
- Hemerocallis 'Statuesque' – daylily
- Hemerocallis 'Taos' – daylily
- Hemerocallis 'Thin Man' – daylily
- Hemerocallis 'Tiger Blood' – daylily
- Hemerocallis 'VT Spirit' – daylily
- Hemerocallis yezoensis – daylily
- Hemiboea – hemiboea
- Hemiboea bicornuta
- Hemiboea aff. cavaleriei – cavalier hemiboea
- Hemiboea gracilis – slender false sinningia
- Hemiboea subacaulis var. jiangxiensis 'Jiangxi Bells' – false sinningia
- Hemiboea subcapitata – glossy false sinningia
- Hemiptelea davidii – David half-elm
- Heptacodium miconioides – seven-son flower
- Heptapleurum delavayi – hardy schefflera
- Heptapleurum gracile
- Heptapleurum rhododendrifolium
- Hermodactylus tuberosus
- Hertia cheirifolia – barbary ragwort
- Hesperaloe 'Arizona Sunset' – red yucca
- Hesperaloe campanulata – bell flower hesperaloe
- Hesperaloe campanulata (Sierra Chiquita form) – bell flower hesperaloe
- Hesperaloe funifera – false yucca
- Hesperaloe parviflora – red yucca
- Hesperaloe parviflora 'Arizona Sunrise' – red yucca
- Hesperaloe parviflora 'Coral Glow' – red yucca
- Hesperaloe parviflora 'Straight Up Red' – red yucca
- Heteropterys glabra – redwing
- Heuchera 'Black Pearl' – coral bells
- Heuchera 'Carnival Burgundy Blast' – coral bells
- Heuchera 'Delta Dawn' – coral bells
- Heuchera himalayensis – Himalayan coral bells
- Heuchera 'Rosamund' – coral bells
- Heuchera 'Southern Comfort' – coral bells
- Heuchera 'Steel City' – coral bells
- Heuchera 'Tnheueb' – Northern Exposure Black coral bells
- Heuchera 'Tnheuga' – Grande Amethyst coral bells
- Heuchera 'Tnheugb' – Grande Black coral bells
- Heuchera 'Tnheunel' – Northern Exposure Lime coral bells
- Heuchera 'Tnheunep' – Northern Exposure Purple coral bells
- Heuchera 'Tnheuner' – Northern Exposure Red coral bells
- Heuchera 'Tnheunes' – Northern Exposure Silver coral bells
- Heuchera (unknown Terra Nova cultivar with coral/peach leaves)
- Heuchera villosa 'Autumn Bride' – coral bells
- Hibiscus – mallow
- Hibiscus 'Airbrush Effect' – mallow
- Hibiscus 'All Eyes on Me' – Summerific mallow
- Hibiscus 'Cherry Cheesecake' – Summerific rose mallow
- Hibiscus 'Cherry Choco Latte' – Summerific mallow
- Hibiscus coccineus – scarlet mallow
- Hibiscus coccineus f. albus – white-flowered scarlet rose mallow
- Hibiscus 'Fireball' – mallow
- Hibiscus grandiflorus – swamp rose-mallow
- Hibiscus 'Happa Red' – Big Hit mallow
- Hibiscus 'Holly Springs' – mallow
- Hibiscus 'Jackie Grant' – mallow
- Hibiscus laevis – mallow
- Hibiscus 'Lohengrin' – mallow
- Hibiscus mutabilis – Confederate rose
- Hibiscus paramutabilis – everblooming Confederate rose
- Hibiscus 'Peppermint Flare' – mallow
- Hibiscus 'Raspberry Glace' (TAMUS 161020C-4SLW) – mallow
- Hibiscus 'Rubrum' – mallow
- Hibiscus sinosyriacus 'Lilac Queen' – Chinese rose-of-Sharon
- Hibiscus striatus subsp. lambertianus – striped rose mallow
- Hibiscus 'Summer Carnival' – mallow
- Hibiscus 'Summer Storm' – mallow
- Hibiscus syriacus 'America Irene Scott' – Sugar Tip variegated rose-of-Sharon
- Hibiscus syriacus 'Boule de Feu' – rose-of-Sharon
- Hibiscus syriacus 'Buddha Belly' – rose-of-Sharon
- Hibiscus syriacus 'Diana' – rose-of-Sharon
- Hibiscus syriacus 'DS03RS' – Raspberry Smoothie rose-of-Sharon
- Hibiscus syriacus 'Floru' – Violet Satin rose-of-Sharon
- Hibiscus syriacus 'Gandini Santiago' – Purple Pillar rose-of-Sharon
- Hibiscus syriacus 'Gandini van Aart' – White Pillar rose-of-Sharon
- Hibiscus syriacus 'Helene' – rose-of-Sharon
- Hibiscus syriacus 'Marina' – Blue Satin rose-of-Sharon
- Hibiscus syriacus 'Meehanii' – variegated rose-of-Sharon
- Hibiscus syriacus 'Minerva' – rose-of-Sharon
- Hibiscus syriacus 'Oiseau Bleu' – rose-of-Sharon
- Hibiscus syriacus 'Rosina' – Pollypetite rose-of-Sharon
- Hibiscus syriacus (white leaves) – rose-of-Sharon
- Hibiscus – Tamus 171351E mallow
- Hibiscus 'TAMUS 171845-2W DL' – Plum Brandy mallow
- Hibiscus 'Valentine's Crush' – Summerific mallow
- Hibiscus 'Vincotto' (TAMUS 171658W) – mallow
- Hieracium maculatum 'Leopard'
- Hieracium tomentosum – wooly hawkweed
- ×Hippeasprekelia – hybrid amaryllis
- ×Hippeasprekelia 'Durga Pradhan' – hybrid amaryllis
- Hippeastrum – garden amaryllis
- Hippeastrum ×ackermanii
- Hippeastrum 'Acropolis' – garden amaryllis
- Hippeastrum 'Alfresco'
- Hippeastrum 'Aphrodite'
- Hippeastrum 'Apple Blossom' – garden amaryllis
- Hippeastrum 'Baby Star'
- Hippeastrum 'Barotse' – garden amaryllis
- Hippeastrum 'Cocktail' – garden amaryllis
- Hippeastrum 'Exotic Star'
- Hippeastrum 'Fanfare'
- Hippeastrum 'Hercules' – garden amaryllis
- Hippeastrum ×johnsonii – St. Joseph's lily
- Hippeastrum 'Lemon Star'
- Hippeastrum 'Milady' – garden amaryllis
- Hippeastrum 'Minerva' – garden amaryllis
- Hippeastrum 'Picotee' – garden amaryllis
- Hippeastrum 'Red Lion' – garden amaryllis
- Hippeastrum 'Safari' – garden amaryllis
- Hippeastrum 'Sun Dance' – garden amaryllis
- Hippeastrum 'Sweet Star'
- Hippeastrum 'Vera' – garden amaryllis
- Hippeastrum 'Voodoo' – garden amaryllis
- Hippeastrum 'Wedding Dance'
- Hosta – garden hosta
- Hosta 'Age of Gold' – hosta
- Hosta 'Autumn Frost' – hosta
- Hosta 'Blonde Ambition' – hosta
- Hosta 'Blue Cadet' – blue leaf hosta
- Hosta 'Blue Jay' – hosta
- Hosta 'Blue Mouse Ears' – miniature hosta
- Hosta 'Branching Out' – hosta
- Hosta 'Carolina Sunshine' – variegated hosta
- Hosta 'Cat and Mouse' – hosta
- Hosta 'Dancing Queen' – hosta
- Hosta 'Duchess' – variegated hosta
- Hosta 'Earth Angel' – hosta
- Hosta 'Electrocution' – wavy leaf hosta
- Hosta 'Elvis Lives' – hosta
- Hosta 'Empress Wu' – hosta
- Hosta 'First Lady' – variegated hosta
- Hosta 'Fried Bananas' – hosta
- Hosta 'Gold Edger' – hosta
- Hosta 'Golden Tiara' – hosta
- Hosta 'Grand Prize' – hosta
- Hosta 'Grand Tiara' – variegated hosta
- Hosta 'Halcyon' – hosta
- Hosta 'Hans' – variegated hosta
- Hosta 'Hans Solo' – hosta
- Hosta 'Hudson Bay' – variegated hosta
- Hosta 'Hush Puppy' – hosta
- Hosta 'Island Breeze' – hosta
- Hosta 'Jilan' – hosta
- Hosta 'June' – hosta
- Hosta kikutii var. caput-avis – bowing hosta
- Hosta kiyosumiensis – mountain hosta
- Hosta 'Komodo Dragon' – hosta
- Hosta 'Luna Moth' – variegated hosta
- Hosta 'Mouse Trap' – hosta
- Hosta nakaiana – ornamental hairpin hosta
- Hosta 'Paradigm' – variegated hosta
- Hosta plantaginea – fragrant hosta
- Hosta 'Prairie Sky' – hosta
- Hosta 'Rainbow's End' – hosta
- Hosta 'Regal Splendor' – variegated hosta
- Hosta 'Rhino Hide' – hosta
- Hosta 'Royal Tiara' – hosta
- Hosta 'Rubies and Ruffles' – hosta
- Hosta 'Seducer' – variegated hosta
- Hosta sieboldiana – Siebold's hosta
- Hosta sieboldiana 'Frances Williams' – Siebold's hosta
- Hosta 'Stained Glass' – hosta
- Hosta 'Sugar and Cream' – variegated hosta
- Hosta 'Sugar and Spice' – hosta
- Hosta 'Sunshine Floozie' – hosta
- Hosta 'Tongue Lashing' – hosta
- Hosta 'Vanilla Bean' – hosta
- Hosta ventricosa – blue hosta
- Hosta 'Victory' – hosta
- Hosta 'Wheee!' – variegated hosta
- Hosta 'Winsome' – hosta
- Hosta 'Yellow Splash Rim' – variegated hosta
- Hosta yingeri – Yinger's hosta
- Hosta 'Zounds' – gold leaf hosta
- Hovenia trichocarpa var. robusta
- ×Howardara 'Riley Kate'
- Hyacinthoides ciliolata
- Hyacinthoides hispanica – Spanish bluebell
- Hyacinthoides hispanica 'Alba' – white Spanish bluebell
- Hyacinthoides hispanica 'City of Haarlem' – Spanish bluebell
- Hyacinthoides hispanica 'Dainty Maid' – pink Spanish bluebell
- Hyacinthoides hispanica 'Excelsior' – Spanish bluebell
- Hyacinthoides hispanica 'Queen of Pinks' – pink Spanish bluebell
- Hyacinthoides non-scripta – English bluebells
- Hyacinthus 'Anastacia'
- Hyacinthus orientalis 'Blue Festival' – garden hyacinth
- Hyacinthus orientalis 'Carnegie' – garden hyacinth
- Hyacinthus orientalis 'Pink Festival' – garden hyacinth
- Hyacinthus orientalis 'White Festival' – garden hyacinth
- Hyacinthus orientalis 'Yellow Queen' – garden hyacinth
- Hyalis argentea
- Hydrangea – hydrangea
- Hydrangea 'After Midnight' – mophead hybrid hydrangea
- Hydrangea anomala subsp. petiolaris 'Early Light' – climbing hydrangea
- Hydrangea anomala subsp. petiolaris 'Miranda' – climbing hydrangea
- Hydrangea arborescens 'Annabelle' – mophead smooth hydrangea
- Hydrangea arborescens subsp. arborescens – smooth hydrangea
- Hydrangea arborescens 'Haas' Halo' – smooth hydrangea
- Hydrangea arborescens 'Mary Nell' – smooth hydrangea
- Hydrangea arborescens 'NCHA3' – Invincibelle Ruby smooth hydrangea
- Hydrangea arborescens 'NCHA4' – Incrediball Blush smooth hydrangea
- Hydrangea arborescens 'NCHA5' – Invincibelle Wee White smooth hydrangea
- Hydrangea arborescens 'NCHA6' – Invincibelle Garnetta smooth hydrangea
- Hydrangea arborescens 'NCHA7' – Invincibelle Mini Mauvette smooth hydrangea
- Hydrangea arborescens 'NCHA8' – Invincibelle Limetta smooth hydrangea
- Hydrangea aspera 'Amethyst Crown' – Chinese hydrangea
- Hydrangea hirta – powder-puff shrub
- Hydrangea hirta (HC 970702) – nettle-leaved hydrangea
- Hydrangea involucrata 'Wim Rutten' – Blue Bunny compact bracted hydrangea
- Hydrangea longipes
- Hydrangea longipes var. fulvescens
- Hydrangea macrophylla – bigleaf hydrangea
- Hydrangea macrophylla 'All Summer Beauty' – bigleaf hydrangea
- Hydrangea macrophylla 'Ayesha' – bigleaf hydrangea
- Hydrangea macrophylla 'Bailmacseven' – First Editions Eclipse bigleaf hydrangea
- Hydrangea macrophylla 'Bailmer' – Endless Summer re-blooming bigleaf hydrangea
- Hydrangea macrophylla 'Big Daddy' – bigleaf hydrangea
- Hydrangea macrophylla 'Blaumeise' – bigleaf hydrangea
- Hydrangea macrophylla 'Blue Heaven' – Forever & Ever Blue Heaven bigleaf hydrangea
- Hydrangea macrophylla 'Blushing Bride' – bigleaf hydrangea
- Hydrangea macrophylla 'Cardinal Red' – bigleaf hydrangea
- Hydrangea macrophylla 'Dancing Snow' – bigleaf hydrangea
- Hydrangea macrophylla 'David Ramsey' – bigleaf hydrangea
- Hydrangea macrophylla 'Decatur Blue' – everblooming bigleaf hydrangea
- Hydrangea macrophylla 'Dooley' – mophead bigleaf hydrangea
- Hydrangea macrophylla 'Early Sensation' – Forever & Ever bigleaf hydrangea
- Hydrangea macrophylla 'Frau Reiko' – bigleaf hydrangea
- Hydrangea macrophylla 'Fuji Waterfall' – bigleaf hydrangea
- Hydrangea macrophylla 'Goliath' – mophead bigleaf hydrangea
- Hydrangea macrophylla 'Hatsushimo' – variegated bigleaf hydrangea
- Hydrangea macrophylla 'Kompeito' – Double Delights Star Gazer bigleaf hydrangea
- Hydrangea macrophylla 'Lady in Red' – lacecap bigleaf hydrangea
- Hydrangea macrophylla 'Mariesii Perfecta' – bigleaf hydrangea
- Hydrangea macrophylla 'Mariesii Variegata' – variegated bigleaf hydrangea
- Hydrangea macrophylla ('Mariesii Variegata' new sport) – variegated bigleaf hydrangea
- Hydrangea macrophylla 'McKay' – Cherry Explosion bigleaf hydrangea
- Hydrangea macrophylla 'Möwe' – bigleaf hydrangea
- Hydrangea macrophylla var. normalis 'Nickanyana' – bigleaf hydrangea
- Hydrangea macrophylla 'Oak Hill' – bigleaf hydrangea
- Hydrangea macrophylla 'PIIHM-II' – Endless Summer BloomStruck bigleaf hydrangea
- Hydrangea macrophylla (red leaf, lilac) – bigleaf hydrangea
- Hydrangea macrophylla 'Rei 05' – Forever & Ever Together bigleaf hydrangea
- Hydrangea macrophylla 'Veitchii' – lacecap bigleaf hydrangea
- Hydrangea macrophylla 'Yuki temari' – bigleaf hydrangea
- Hydrangea macrophylla 'Zorro' – bigleaf hydrangea
- Hydrangea paniculata 'Bombshell' – panicle hydrangea
- Hydrangea paniculata 'Brussels Lace' – panicle hydrangea
- Hydrangea paniculata (ex. 'Dharuma') – panicle hydrangea
- Hydrangea paniculata 'Ilvobo' – Bobo panicle hydrangea
- Hydrangea paniculata 'Limelight' – panicle hydrangea
- Hydrangea paniculata 'PIIHP-I' – Baby Lace panicle hydrangea
- Hydrangea paniculata 'Rendia' – Diamond Rouge panicle hydrangea
- Hydrangea paniculata 'Silver Dollar' – panicle hydrangea
- Hydrangea paniculata 'SMHPZIND' – Pillow Talk panicle hydrangea
- Hydrangea paniculata 'SMNHPRZEP' – Zinfin Doll panicle hydrangea
- Hydrangea paniculata 'Wim's Red' – Fire and Ice panicle hydrangea
- Hydrangea quercifolia 'Alison' – oakleaf hydrangea
- Hydrangea quercifolia 'Brido' – Snowflake oakleaf hydrangea
- Hydrangea quercifolia 'Doughill' – Gatsby Star double oakleaf hydrangea
- Hydrangea quercifolia 'Emerald Lake' – oakleaf hydrangea
- Hydrangea quercifolia 'Flemygea' – Snow Queen oakleaf hydrangea
- Hydrangea quercifolia 'Ice Crystal' – oakleaf hydrangea
- Hydrangea quercifolia 'JoAnn' – Gatsby Pink oakleaf hydrangea
- Hydrangea quercifolia 'Little Honey' – golden oakleaf hydrangea
- Hydrangea quercifolia 'Lynn Lowrey' – oakleaf hydrangea
- Hydrangea quercifolia 'Munchkin' – dwarf oakleaf hydrangea
- Hydrangea quercifolia 'PIIHQ-I' – Jetstream compact oakleaf hydrangea
- Hydrangea quercifolia 'Ruby Slippers' – oakleaf hydrangea
- Hydrangea quercifolia 'Semmes Beauty' – oakleaf hydrangea
- Hydrangea quercifolia 'Suma Kanda Starlight' – oakleaf hydrangea
- Hydrangea quercifolia 'Turkey Heaven' – oakleaf hydrangea
- Hydrangea aff. scandens
- Hydrangea scandens subsp. chinensis f. angustipetala – hydrangea
- Hydrangea seemannii – Seemann's hydrangea
- Hydrangea serrata – mountain hydrangea
- Hydrangea serrata 'Annie's Blue' – mountain hydrangea
- Hydrangea serrata 'Blue Billow' – mountain hydrangea
- Hydrangea serrata 'Grayswood' – mountain hydrangea
- Hydrangea serrata 'Hakusen' – mountain hydrangea
- Hydrangea serrata 'Intermedia' – mountain hydrangea
- Hydrangea serrata 'Kiyosumisawa' – mountain hydrangea
- Hydrangea serrata 'Kogane Suruge' – mountain hydrangea
- Hydrangea serrata 'Kokonoe-yama' – mountain hydrangea
- Hydrangea serrata 'Kurenai' – mountain hydrangea
- Hydrangea serrata 'Ô Amacha Nishiki' – tea hydrangea
- Hydrangea serrata 'Shichidanka' – mountain hydrangea
- Hydrangea serrata 'Shichidanka Nishiki' – variegated phantom hydrangea
- Hydrangea serrata 'Woodlanders' – mountain hydrangea
- Hydrangea aff. strigosa
- Hydrangea 'Summer Frost' – hybrid hydrangea
- Hydrangea
- Hydrangea xanthoneura var. setchuenensis – hanging hydrangea
- Hylotelephium 'Back in Black' – tall sedum
- Hylotelephium 'Carl' – hybrid stonecrop
- Hylotelephium 'Cherry Truffle'
- Hylotelephium 'Firecracker' – SunSparkler stonecrop
- Hylotelephium 'Garbro' – Garnet Brocade stonecrop
- Hylotelephium 'Maestro' – hybrid stonecrop
- Hylotelephium 'Matrona' – hybrid stonecrop
- Hylotelephium 'Pure Joy' – hybrid stonecrop
- Hylotelephium spectabile '21P02' – showy stonecrop
- Hylotelephium spectabile 'Zi Juan' – Pink Sundae showy stonecrop
- Hylotelephium telephium
- Hylotelephium 'Thundercloud' – dwarf sedum
- Hylotelephium ussuriense 'Chuwangsan'
- Hymenocallis – spider lily
- Hymenocallis acutifolia
- Hymenocallis 'Advance'
- Hymenocallis caribaea 'Superstar'
- Hymenocallis choctawensis – Choctaw spiderlily
- Hymenocallis ×festalis
- Hymenocallis glauca – Oaxaca spider lily
- Hymenocallis (Guatemala form) – spider lily
- Hymenocallis harrisiana – St. Nicholas star
- Hymenocallis imperialis – Mexican spider lily
- Hymenocallis liriosme – Texas spiderlily
- Hymenocallis littoralis × liriosme – hybrid spider lily
- Hymenocallis puntagordensis
- Hymenocallis puntagordensis (Punta Gorda, FL form)
- Hymenocallis pygmaea 'Carolina Creeper' – dwarf spider lily
- Hymenocallis riparia – Mexican spider lily
- Hymenocallis cf. rotata (Lower Suwannee form) – streambank spiderlily
- Hymenocallis 'Sulphur Queen'
- Hymenocallis 'Tropical Giant' – spider lily
- Hypericum calycinum 'Crowthyp' – Fiesta St. John's-wort
- Hypericum cerastioides 'Silvana' – St. John's-wort
- Hypericum forrestii – Forrest St. John's-wort
- Hypericum ×inodorum 'Kolmatri' – Magical Triumph St. John's-wort
- Hypericum latisepalum – St. John's-wort
- Hypericum lissophloeus – smoothbark St. John's-wort
- Hypericum lobocarpum – fivelobe St. John's-wort
- Hypericum prolificum – shrubby St. John's-wort
- Hypericum 'Red' – HyperBerries St. John's-wort
- Hypoxis hemerocallidea – African star flower
- Hypoxis nitidum
- Hypoxis rooperi – Rooper's star-grass
- Hyssopus seravschanicus
- Iberis sempervirens – candytuft
- Iberis sempervirens 'Snow White' – candytuft
- Iberis sempervirens 'Snowcone Forte' – candytuft
- Iberis sempervirens 'Snowdrift' – candytuft
- Iberis simplex – candytuft
- Ilex – holly
- Ilex 'Apollo' – hybrid winterberry holly
- Ilex aquifolium 'Aurifodina' – variegated English holly
- Ilex aquifolium 'Peter Gentling' – English holly
- Ilex ×attenuata – Topal holly
- Ilex ×attenuata 'Howard' – Topal holly
- Ilex ×attenuata 'Nasa' – dwarf Topal holly
- Ilex ×attenuata 'Pack's Weeping' – weeping Topal holly
- Ilex ×attenuata 'Sunny Foster' – golden Foster holly
- Ilex buergeri – Buerger holly
- Ilex 'Carolina Cardinal' – hybrid winterberry holly
- Ilex 'Carolina Cone' – holly
- Ilex 'Carolina Sentinel' – NCSU hybrid evergreen holly
- Ilex cassine var. angustifolia – narrow-leaf dahoon holly
- Ilex cassine 'Orton's Hybrid' – dahoon holly
- Ilex 'Cherry Bomb' – U. S. National Arboretum hybrid holly
- Ilex cornuta – Chinese holly
- Ilex cornuta 'D'Or' – Chinese holly
- Ilex cornuta (ex. 'Rotunda', gold leaf) – Chinese holly
- Ilex cornuta 'Greer' – Berries Jubilee Chinese holly
- Ilex cornuta 'Masashi's Gold' – Chinese holly
- Ilex cornuta 'O. Spring' – Chinese holly
- Ilex cornuta 'Sunrise' – Chinese holly
- Ilex cornuta ('Willowleaf' variegated) – Chinese holly
- Ilex crenata 'Adorned' – Japanese holly
- Ilex crenata (Crowder upright) – Japanese holly
- Ilex crenata 'Drops of Gold' – golden Japanese holly
- Ilex crenata 'Farrowone' – Sky Pointer upright Japanese holly
- Ilex crenata 'Golden Soft Touch' – Japanese holly
- Ilex crenata 'NCIC1' – Glow Pop Japanese holly
- Ilex crenata 'RutHol2' – Bullseye Japanese holly
- Ilex crenata 'RutHol3' – Jade Lance Japanese holly
- Ilex crenata 'Snowflake' – variegated Japanese holly
- Ilex decidua 'Midas' – possumhaw
- Ilex decidua (SFA No. 4) – possumhaw holly
- Ilex dimorphophylla × I. cornuta – hybrid holly
- Ilex 'Dorothy Lawton' – Dodd hybrid evergreen holly
- Ilex glabra 'Compacta' – inkberry
- Ilex glabra 'Shamrock' – inkberry
- Ilex 'HL10-90' – Christmas Jewel evergreen holly
- Ilex integra – Nepal holly
- Ilex integra 'Green Shadow' – variegated Nepal holly
- Ilex integra × I. latifolia – hybrid holly
- Ilex integra 'Ogon' – golden Nepal holly
- Ilex integra (variegated)
- Ilex ×koehneana 'Martha Berry' – Koehne holly
- Ilex 'Lady Spike' – holly
- Ilex latifolia – lusterleaf holly
- Ilex latifolia 'Gulino Gardens' – lusterleaf holly
- Ilex 'Mary Nell' – McDaniel hybrid evergreen holly
- Ilex micrococca – thin-leaf holly
- Ilex 'Miss Patricia' – Dodd hybrid evergreen holly
- Ilex 'Mondo' – Little Rascal holly
- Ilex myrtifolia 'Duling's Variegated' – myrtle leaf holly
- Ilex 'Nellie R. Stevens' – Nellie R. Stevens holly
- Ilex 'Nellie R. Stevens' (gold margin)
- Ilex nipponica – holly
- Ilex opaca – American holly
- Ilex opaca 'Clarendon Spreading' – compact American holly
- Ilex opaca 'Morgan Gold' – American holly
- Ilex opaca 'Rollover' – American holly
- Ilex opaca 'Royal Flush' – variegated American holly
- Ilex opaca 'William Hawkins' – narrowleaf American holly
- Ilex 'Orange You Pretty'
- Ilex 'Patricia Varner' – Dodd hybrid evergreen holly
- Ilex aff. pedunculosa
- Ilex 'Philip Watson' – holly
- Ilex purpurea – peach leaf holly
- Ilex 'Raritan Chief' – hybrid winterberry holly
- Ilex rotunda – round leaf holly
- Ilex aff. rotunda
- Ilex rotunda (yellow fruit)
- Ilex 'Sadie Scudder' – variegated holly
- Ilex 'Scepter' – Kosar hybrid evergreen holly
- Ilex serrata – sawtooth holly
- Ilex 'Solar Flare' – variegated holly
- Ilex sugerokii subsp. longipedunculata – victorian holly
- Ilex 'Venus' – evergreen holly
- Ilex verticillata 'FARROWBPOP' – Berry Poppins winterberry holly
- Ilex verticillata 'FARROWMRP' – Mr. Poppins winterberry holly
- Ilex verticillata 'Golden Verboom' – yellow-berry winterberry holly
- Ilex verticillata 'NCIV1' – Little Goblin Red winterberry holly
- Ilex verticillata 'NCIV2' – Little Goblin Orange winterberry holly
- Ilex verticillata 'NCIV3' – Little Goblin Guy winterberry holly
- Ilex verticillata 'Red Sprite' – winterberry holly
- Ilex verticillata 'Scarlett O'Hara' – winterberry holly
- Ilex verticillata 'Winter Gold' – yellow-berry winterberry holly
- Ilex vomitoria 'Carolina Ruby' – dwarf yaupon holly
- Ilex vomitoria 'Dare County' – orange-berry yaupon holly
- Ilex vomitoria 'Dodd's Cranberry' – yaupon holly
- Ilex vomitoria (dwarf gold sport) – yaupon holly
- Ilex vomitoria 'Gold Top' – yaupon holly
- Ilex vomitoria 'Gremicr' – Micron dwarf yaupon holly
- Ilex vomitoria 'Lance's Weeper' – weeping yaupon holly
- Ilex vomitoria 'Lowrey's Big Leaf' – yaupon holly
- Ilex vomitoria 'Mike James' – yaupon holly
- Ilex vomitoria 'Nana' – dwarf yaupon holly
- Ilex vomitoria 'Poole's Best' – yaupon holly
- Ilex vomitoria 'Saratoga Gold' – yellow-berry yaupon holly
- Ilex vomitoria 'Tricolor' – variegated yaupon holly
- Ilex vomitoria 'Wiggins' – yaupon holly
- Ilex vomitoria 'Will Fleming' – fastigiate yaupon holly
- Ilex vomitoria 'Yawkey' – yellow-berry yaupon holly
- Ilex ×wandoensis – Wando Island holly
- Ilex 'Whoa Nellie' – golden Nellie Stevens holly
- Illicium – anise
- Illicium anisatum – Japanese star anise
- Illicium anisatum 'Hakku' – star anise
- Illicium anisatum 'Murasaki-no-sato' – Purple Glaze star anise
- Illicium floridanum f. album – white Florida anise
- Illicium floridanum f. album 'Semmes' – white-flowered Florida anise
- Illicium floridanum 'Grey Ghost' – Florida anise
- Illicium floridanum 'Jo's Variegated' – variegated Florida anise
- Illicium floridanum 'Swamp Hobbit' – dwarf Florida anise
- Illicium henryi – Henry anise
- Illicium lanceolatum – Chinese anise
- Illicium macranthum – large-flowered anise tree
- Illicium mexicanum 'Aztec Fire' – Mexican anise
- Illicium 'NCIH2' – Orion compact anise
- Illicium oligandrum – anise shrub
- Illicium parviflorum 'Florida Sunshine' – yellow anise
- Illicium parviflorum 'Forest Green' – yellow anise
- Illicium parviflorum (upright form)
- Illicium 'Ruby Stars' – anise
- Impatiens arguta – busy lizzie
- Impatiens hawkeri
- Impatiens omeiana – hardy impatiens
- Impatiens omeiana 'Ice Storm' – hardy impatiens
- Impatiens omeiana 'Silver Pink' – hardy impatiens
- Indigofera decora f. alba – white Chinese indigo
- Indigofera dielsiana – Yunnan indigo
- Indigofera heterantha – Himalayan indigo
- Indigofera kirilowii 'Angyo Snow' – Kirilow's indigo
- Indigofera kirilowii 'Bernheim'
- Indigofera pseudotinctoria – false Indigo
- Iochroma australe 'Lago Azul'
- Iochroma cyaneum 'Burgundy Wine' – tubeflower
- Ipheion 'Alberto Castillo' – star flower
- Ipheion uniflorum – spring starflower
- Ipheion uniflorum 'Froyle Mill' – spring starflower
- Ipheion uniflorum 'Jessie' – spring starflower
- Ipheion uniflorum 'Rolf Fiedler' – spring starflower
- Ipheion uniflorum 'Tessa' – spring starflower
- Ipheion uniflorum 'White Star' – spring starflower
- Ipheion uniflorum 'Wisley Blue' – spring starflower
- Ipomoea bonariensis – tropical morning glory
- Iris – iris
- Iris 'Abbey Road'
- Iris 'Acapulco' – Dutch iris
- Iris 'Adopt Me' – intermediate bearded iris
- Iris 'Again and Again' – tall bearded reblooming iris
- Iris 'Alaska'
- Iris ×ampliflora 'Ming Treasure' – hybrid iris
- Iris 'Ann Chowning' – Louisiana iris
- Iris aphylla – stool iris
- Iris 'Baldwin'
- Iris 'Bayou Savage' – Louisiana iris
- Iris 'Bayou Short Stuff' – Louisiana iris
- Iris (bearded)
- Iris 'Berlin Network'
- Iris 'Bethany Claire'
- Iris 'Bewilderbeast'
- Iris 'Black Falls' – tall bearded iris
- Iris 'Black Gamecock' – Louisiana iris
- Iris 'Blue Magic'
- Iris 'Blue Review' – tall bearded reblooming iris
- Iris brevicaulis – zig zag iris
- Iris brevicaulis 'Mac's White'
- Iris 'Bronze Beauty'
- Iris bucharica – Bokhara iris
- Iris bungei – large bract iris
- Iris (Cal-sib dwarf)
- Iris 'C'est Magnifique' – Louisiana iris
- Iris 'Change of Pace' – tall bearded iris
- Iris 'Clara Goula' – Louisiana iris
- Iris 'Clarence' – bearded iris
- Iris 'Clyde Redmond' – Louisiana iris
- Iris (crocea hybrid)
- Iris 'Crowned Heads' – tall bearded iris
- Iris 'Daughter of Stars' – tall bearded iris
- Iris delavayi – Delavay's iris
- Iris 'Dixie Deb' – Louisiana iris
- Iris 'Double Your Fun' – intermediate bearded iris
- Iris 'Dural White Butterfly' – Louisiana iris
- Iris 'Emilie Dolge'
- Iris ensata 'Blue Spritz' – Japanese water iris
- Iris ensata 'Variegata' – variegated Japanese water iris
- Iris 'Eolian' – Louisiana iris
- Iris 'Eye of the Tiger'
- Iris 'Fall Majesty'
- Iris 'Fall Spotlight' – reblooming tall bearded Iris
- Iris 'Finalist'
- Iris 'Flower Shower' – standard dwarf bearded iris
- Iris foetidissima
- Iris 'Freedom Song' – tall bearded iris
- Iris 'Frosted Olive'
- Iris fulva 'Little Cajun' – copper iris
- Iris fulva 'Wetora' – copper iris
- Iris ×germanica 'Rosalie Figge' – German iris
- Iris giganticaerulea 'Her Highness' – Louisiana iris
- Iris 'Golden Beauty'
- Iris 'Golden Panther' – tall bearded iris
- Iris 'Grace Duhon' – Louisiana iris
- Iris graminea – plum-scented iris
- Iris 'Grape Reprise'
- Iris 'Harvest of Memories' – reblooming tall bearded iris
- Iris 'Hemstitched' – tall bearded iris
- Iris henryi
- Iris hexagona (recurved Hwy 98 form)
- Iris hexagona (St. Marks Midget form)
- Iris histrioides 'Finola' – reticulate iris
- Iris histrioides 'George' – reticulate iris
- Iris histrioides 'Lady Beatrix Stanley' – reticulate iris
- Iris histrioides 'Polar Ice'
- Iris 'In Retrospect' – tall bearded reblooming iris
- Iris 'In Your Dreams' – tall bearded iris
- Iris 'Innocent Star'
- Iris 'James Dickenson'
- Iris 'Jane Troutman'
- Iris japonica 'Butterfly Dreams' – butterfly iris
- Iris japonica 'Eco Easter' – butterfly iris
- Iris japonica 'Porcelain Maiden' – butterfly iris
- Iris japonica 'Skirt Chaser' – evergreen butterfly iris
- Iris 'Kimboshi' – iris
- Iris 'King Creole' – Louisiana iris
- Iris 'Kissed by the Sun' – tall bearded iris
- Iris 'Kurokawa-Noh' – pseudata iris
- Iris lazica
- Iris 'Lilla' – tall bearded iris
- Iris 'Lilla Alberta'
- Iris 'Lilting' – 'lilting' tall bearded iris
- Iris longipetala
- Iris 'Lumalite' – standard dwarf bearded iris
- Iris 'Making Eyes' – Iris 'Making Eyes'
- Iris 'Mallory Kay' – tall bearded iris
- Iris 'Margaret Hunter' – Louisiana iris
- Iris 'Marie Dolores' – Louisiana iris
- Iris 'Marris' – intermediate bearded iris
- Iris melitta
- Iris 'Melted Butter' – tall bearded iris
- Iris 'Midnight Oil' – tall bearded iris
- Iris aff. milesii – red flower iris
- Iris monnieri – iris of Rhodes
- Iris 'My Fantasy'
- Iris 'Mystic Beauty'
- Iris 'Nada' – butterfly iris
- Iris nelsonii – Nelson's iris
- Iris 'Noble Lady' – tall bearded iris
- Iris notha
- Iris 'Now See This' – tall bearded iris
- Iris odaesanensis
- Iris 'Othello' – tall bearded iris
- Iris oxypetala
- Iris pallasii – Dalmatian iris
- Iris pallida 'Variegata'
- Iris 'Panther'
- Iris 'Pauline' – netted iris
- Iris (peach)
- Iris 'Phil Edinger'
- Iris 'Pretty Princess' – intermediate bearded iris
- Iris 'Professor Paul' – Louisiana iris
- Iris ×pseudata 'Chance Beauty' – hybrid iris
- Iris ×pseudata 'Roryu' – hybrid iris
- Iris ×pseudata 'Sakai-no-Ogon' – hybrid iris
- Iris ×pseudata 'Yarai' – hybrid iris
- Iris 'Pure Sapphire' – tall bearded iris
- Iris 'Purring Tiger' – Siberian iris
- Iris 'Raspberry Silk' – border bearded iris
- Iris 'Redelta'
- Iris [Reticulata Group] 'Alida' – netted iris
- Iris [Reticulata Group] 'Cantab' – netted iris
- Iris [Reticulata Group] 'Gordon' – netted iris
- Iris [Reticulata Group] 'Harmony' – netted iris
- Iris [Reticulata Group] 'J. S. Dijt' – netted iris
- Iris [Reticulata Group] 'Pixie' – netted iris
- Iris [Reticulata Group] 'Rhapsody' – netted iris
- Iris [Reticulata Group] 'Spring Time' – netted iris
- Iris [Reticulata Group] 'Sunshine'
- Iris 'Ride the Tiger' – tall bearded iris
- Iris 'Roy's Repeater'
- Iris ruthenica – dwarf iris
- Iris savannarum f. albispiritis
- Iris 'Say Okay'
- Iris 'Sea Wisp' – Louisiana iris
- Iris setosa – beachhead iris
- Iris setosa 'Hokkaido Purple' – beachhead iris
- Iris 'Shire'
- Iris sibirica 'Black Joker' – Siberian iris
- Iris sibirica 'Blackberry Jubilee' – Siberian iris
- Iris sibirica 'Kaboom' – Siberian iris
- Iris sibirica 'Lights of Paris' – Siberian iris
- Iris sibirica 'Roaring Jelly' – Siberian iris
- Iris sibirica 'Tealwood' – Siberian iris
- Iris 'Silver Beauty'
- Iris 'Sinfonietta' – Louisiana iris
- Iris 'Sky and Sun' – tall bearded iris
- Iris 'Sky Beauty'
- Iris 'Slovak Prince' – tall bearded iris
- Iris 'Sparkling'
- Iris 'Sparkling Rose' – Siberian iris
- Iris 'Spiced Tiger' – tall bearded iris
- Iris 'Spouting Horn' – tall bearded iris
- Iris spuria subsp. carthaliniae – spuria iris
- Iris spuria subsp. ochroleuca – seashore iris
- Iris 'Starlight Starbright' – Louisiana iris
- Iris 'Starwoman' – intermediate bearded iris
- Iris 'Summer Olympics'
- Iris 'Surf's Up'
- Iris 'Symphony' – tall bearded iris
- Iris (TB purple)
- Iris (TB unknown color)
- Iris tectorum – roof iris
- Iris tectorum 'Alba' – roof iris
- Iris tectorum (ex. Jiuzhaigou) – roof iris
- Iris 'Tenderly'
- Iris 'Time to Shine' – dwarf bearded iris
- Iris tridentata – savannah iris
- Iris tridentata (blue violet)
- Iris tridentata (near white)
- Iris tridentata (red violet) – Savannah Iris
- Iris typhifolia
- Iris 'Unchained Melody' – tall bearded iris
- Iris unguicularis – winter flowering iris
- Iris unguicularis subsp. cretensis 'Kotsifou Gorge'
- Iris unguicularis 'Dazzling Eyes'
- Iris unguicularis 'Winter Echoes' – Algerian iris
- Iris 'Vapor' – tall bearded iris
- Iris variegata – iris
- Iris versicolor – northern blue flag
- Iris versicolor 'Purple Flame' – northern blue flag
- Iris 'Victoria Falls' – tall bearded iris
- Iris 'Violet Classic'
- Iris virginica 'Carl Amason' – Southern blue flag
- Iris virginica 'Contraband Girl' – southern blue flag
- Iris 'Vision in Pink' – tall bearded iris
- Iris 'Walker Ross' – arilbred iris
- Iris (wattii × japonica 'BD') – hybrid iris
- Iris 'Wetsurp' – Louisiana iris
- Iris 'Wonders Never Cease'
- Iris 'Yasha' – pseudata iris
- Isodon longitubus – trumpet spurflower
- Isopyrum biternatum – false rue anemone
- Itea chinensis – Chinese sweetspire
- Itea japonica – Japanese sweetspire
- Itea omeiensis – sweetspire
- Itea virginica 'Bailteaone' – Love Child Virginia sweetspire
- Itea virginica 'Henry's Garnet' – Virginia sweetspire
- Itea virginica 'Japanese American' – Virginia sweetspire
- Itea virginica 'Longspire' – Virginia sweetspire
- Itea virginica 'Morning Star' – Virginia sweetspire
- Itea virginica 'Morton' – Scarlet Beauty Virginia sweetspire
- Itea virginica 'Shirley's Compact' – miniature Virginia sweetspire
- Itea virginica 'SMNIVMM' – Fizzy Mizzy Virginia sweetspire
- Ixia paniculata 'Eos'
- Jasione montana
- Jasminum – jasmine
- Jasminum beesianum – Chinese jasmine
- Jasminum iraidii – shrub jasmine
- Jasminum mesnyi 'Gold Tip' – variegated primrose jasmine
- Jasminum nudiflorum 'Aureum' – golden winter jasmine
- Jasminum officinale 'Devon Cream' – jasmine
- Jasminum officinale 'Frojas' – Fiona Sunrise jasmine
- Juncus – rush
- Juncus (curly leaf) – corkscrew rush
- Juncus effusus – soft rush
- Juncus effusus var. pacificus 'Quartz Creek' – Pacific rush
- Juncus effusus f. spiralis 'Big Twister' – corkscrew rush
- Juncus inflexus 'Blue Arrows' – European meadow rush
- Juncus inflexus
- Juncus pallidus 'Javelin' – giant rush
- Juncus patens 'Carman's Gray' – spreading rush
- Juncus tenuis 'Blue Dart' – rush
- Juniperus barbadensis var. luceyana – Lucayan juniper
- Juniperus cedrus – Canary Islands juniper
- Juniperus chinensis 'Echiniformis' – Chinese juniper
- Juniperus chinensis 'Maymont Gold' – Chinese juniper
- Juniperus chinensis 'Shimpaku Gold' – Chinese juniper
- Juniperus chinensis 'Shoosmith' – Chinese juniper
- Juniperus chinensis 'Sylvestris' – Chinese juniper
- Juniperus communis var. depressa 'Hitchcock' – Southern common juniper
- Juniperus communis 'Gold Cone' – gold-column common juniper
- Juniperus communis 'Gold Totem Pole' – common juniper
- Juniperus communis 'Lemon Spire' – common juniper
- Juniperus communis (Magowan form) – common juniper
- Juniperus deppeana (compact blue)
- Juniperus foetidissima – stinking juniper
- Juniperus formosana – Formosan juniper
- Juniperus horizontalis 'Bar Harbor' – creeping juniper
- Juniperus horizontalis 'Blue Pygmy' – miniature creeping juniper
- Juniperus horizontalis 'Copper Harbor' – creeping juniper
- Juniperus horizontalis 'Gold Strike' – golden creeping juniper
- Juniperus horizontalis 'Golden Carpet' – golden creeping juniper
- Juniperus horizontalis 'Maiden Gold' – golden creeping juniper
- Juniperus horizontalis 'Mother Lode' – golden creeping juniper
- Juniperus horizontalis 'Pancake' – creeping juniper
- Juniperus horizontalis 'Planifolia' – creeping juniper
- Juniperus horizontalis 'Silver Sheen' – creeping juniper
- Juniperus monosperma – oneseed juniper
- Juniperus procumbens – Japanese garden juniper
- Juniperus procumbens 'Greenmound Nana' – Japanese garden juniper
- Juniperus procumbens [Nana Group] 'California' – dwarf Japanese Garden juniper
- Juniperus rigida subsp. conferta 'Emerald Sea' – shore juniper
- Juniperus rigida subsp. conferta 'sPg-3-016' – Golden Pacific shore juniper
- Juniperus rigida subsp. conferta 'Sunsplash' – variegated shore juniper
- Juniperus rigida 'Hikari' – goldtip temple juniper
- Juniperus rigida 'Tight Fastigiate Cone' – temple juniper
- Juniperus seravschanica – Pashtun juniper
- Juniperus squamata 'Meyeri' – flaky juniper
- Juniperus virginiana 'Ascension' – eastern red cedar
- Juniperus virginiana 'Glauca Compacta' – compact blue eastern redcedar
- Juniperus virginiana (mounding form) – eastern red cedar
- Juniperus virginiana 'Regal' – variegated eastern red cedar
- Juniperus virginiana (Scott Burrell's extreme narrow form) – eastern red cedar
- Juniperus virginiana 'Silver Spear' – eastern red cedar
- Juniperus virginiana (Wake Forest variegated) – variegated eastern redcedar
- Justicia brandegeeana – shrimp plant
- Justicia carnea (dark leaved) – Brazilian plume
- Kadsura japonica 'Fukurin' – kadsura
- Kadsura japonica 'Kumagai' – kadsura
- Kadsura longipedunculata – Chinese kadsura
- Kalmia latifolia 'Croft Carpet' – mountain laurel
- Kalmia latifolia 'Sepulga Pink' – mountain laurel
- Kerria japonica 'Chiba Gold' – Japanese kerria
- Kerria japonica 'Fubuki Nishiki' – Japanese kerria
- Kerria japonica 'Geisha' – Japanese kerria
- Kerria japonica 'Honshu' – Japanese kerria
- Keteleeria davidiana
- Keteleeria davidiana var. davidiana
- Keteleeria davidiana var. formosana
- Kirengeshoma palmata (white flush) – yellow waxbells
- Kniphofia – red-hot poker
- Kniphofia albescens – white torch lily
- Kniphofia 'Backdraft' – Pyromania Collection red-hot poker
- Kniphofia 'Candlelight' – yellow red-hot poker
- Kniphofia 'Echo Mango' – yellow red-hot poker
- Kniphofia foliosa – red hot poker
- Kniphofia 'Gladness' – red-hot poker
- Kniphofia 'Gold Rush' – red-hot poker
- Kniphofia hirsuta – Fire Dance Dwarf Poker
- Kniphofia northiae – Octopus Red Hot Poker
- Kniphofia 'Nose Job' – red-hot poker
- Kniphofia pauciflora
- Kniphofia 'Rocket Jr.'
- Kniphofia (Rockette Orange) – red-hot poker
- Kniphofia thodei – Thode's red hot poker
- Kniphofia triangularis – dwarf red-hot poker
- Kniphofia tuckii – red hot poker
- Kniphofia uvaria 'KLEKN22193'
- Kniphofia uvaria 'Lola' – red-hot poker
- Koelreuteria paniculata 'Beachmaster' – dwarf goldenrain tree
- Koelreuteria paniculata 'Fastigiata' – columnar goldenrain tree
- Koelreuteria paniculata 'Rose Lantern' – late-flowering goldenrain tree
- Kosteletzkya pentacarpos
- Lagerstroemia 'Cedar Lane Red' – hybrid crepe myrtle
- Lagerstroemia 'Cherry Mocha' – dwarf crape myrtle
- Lagerstroemia 'Chocolate Mocha' – Delta Jazz hybrid crepe myrtle
- Lagerstroemia 'Ebony & Ivory' – purple-leaf crepe myrtle
- Lagerstroemia 'Ebony Embers' – Black Diamond Red Hot crepe myrtle
- Lagerstroemia 'Ebony Flame' – Black Diamond Best Red crepe myrtle
- Lagerstroemia excelsa – crepe myrtle
- Lagerstroemia fauriei – Japanese crepe myrtle
- Lagerstroemia fauriei 'Fantasy' – Japanese crepe myrtle
- Lagerstroemia fauriei 'Townhouse' – Japanese crepe myrtle
- Lagerstroemia 'Frappe Pink' – dwarf crape myrtle
- Lagerstroemia 'Gamad I' – Cherry Dazzle compact crepe myrtle
- Lagerstroemia 'Gamad II' – Raspberry Dazzle compact crepe myrtle
- Lagerstroemia 'Gamad III' – Snow Dazzle compact crepe myrtle
- Lagerstroemia 'Gamad V' – Dazzle Me Pink compact crepe myrtle
- Lagerstroemia 'Gamad VII' – Sweetheart Dazzle dwarf crepe myrtle
- Lagerstroemia indica – crepe myrtle
- Lagerstroemia indica 'Congrabel' – Bellini Grape crepe myrtle
- Lagerstroemia indica 'Conlagras' – Bellini Raspberry crepe myrtle
- Lagerstroemia indica 'Delea' – Delta Moonlight crepe myrtle
- Lagerstroemia indica 'G2X133271' – Infinitini Magenta crepe myrtle
- Lagerstroemia indica 'G2X13377' – Infinitini White dwarf crepe myrtle
- Lagerstroemia indica 'LDC-2' – Emerald Empire Garnet Prince crepe myrtle
- Lagerstroemia indica 'LDC-7' – Emerald Empire series crepe myrtle
- Lagerstroemia indica 'Orchid Cascade' – ground cover crepe myrtle
- Lagerstroemia indica 'Red Filli' – miniature crepe myrtle
- Lagerstroemia indica 'Whit I' – Raspberry Sundae crepe myrtle
- Lagerstroemia indica 'Whit II' – Dynamite crepe myrtle
- Lagerstroemia indica 'Whit III' – Pink Velour crepe myrtle
- Lagerstroemia indica 'Whit IV' – Red Rocket red crepe myrtle
- Lagerstroemia indica 'Whit VII' – Siren Red crepe myrtle
- Lagerstroemia indica 'Whit VIII' – Rhapsody in Pink crepe myrtle
- Lagerstroemia 'Jd827' – Early Bird Purple hybrid crepe myrtle
- Lagerstroemia 'Jd900' – Early Bird White early flowering crepe myrtle
- Lagerstroemia 'LDC-11' – Emerald Empire Precious Pink crepe myrtle
- Lagerstroemia 'LDC-20' – Emerald Empire Crystalline crepe myrtle
- Lagerstroemia 'Like a Latte' – Barista crepe myrtle
- Lagerstroemia limii – crepe myrtle
- Lagerstroemia 'Natchez' – crepe myrtle
- Lagerstroemia 'PIILAG-III' – Red Rooster crepe myrtle
- Lagerstroemia 'PIILAG-IX' – Sunset Magic compact crepe myrtle
- Lagerstroemia 'PIILAG-V' – Midnight Magic crepe myrtle
- Lagerstroemia 'PIILAG-VII' – Ruffled Red Magic crepe myrtle
- Lagerstroemia 'PIILAG-VIII' – Twilight Magic crepe myrtle
- Lagerstroemia (purple leaf) – black leaf crepe myrtle
- Lagerstroemia 'Sweet Macchiato' – Barista crepe myrtle
- Lagerstroemia 'White Cascade' – hybrid crepe myrtle
- Lamium maculatum 'Beacon Silver' – deadnettle
- Lantana camara 'Citrus Salad' – lantana
- Lantana camara 'Ham and Eggs' – lantana
- Lantana camara ('Ham and Eggs' orange sport) – lantana
- Lantana camara 'Star Landing' – lantana
- Lantana 'Chapel Hill Yellow' – lantana
- Lantana montevidensis
- Lantana 'Sunset Beach' – lantana
- Lantana trifolia – three-leaf lantana
- Laurus nobilis – bay laurel
- Laurus nobilis (hardy form) – bay laurel
- Laurus nobilis × Umbellularia californica – bay laurel
- Lavandula 'Avonview' – Spanish lavender
- Lavandula (ex. 'Avonview')
- Lavandula ×intermedia 'Phenomenal' – lavender
- Lavandula stoechas – Spanish lavender
- Lavandula stoechas – Castilliano 2.0 Lilac Spanish lavender
- Lavandula stoechas – Javelin Forte Deep Purple Spanish lavender
- Ledebouria cooperi – Cooper's false scilla
- Ledebouria 'Gary Hammer' – false scilla
- Leopoldia tenuiflora
- Lepechinia hastata – false salvia
- Lepisorus bicolor – Sichuan ribbon fern
- Lepisorus pseudoussuriensis 'Taoshan'
- Leptodermis oblonga
- Leptospermum scoparium 'Kiwi' – tea tree
- Lespedeza buergeri – bush clover
- Lespedeza homoloba
- Lespedeza liukiuensis 'Little Volcano' – bush-clover
- Lespedeza maximowiczii 'Niwata' – bush-clover
- Lespedeza thunbergii subsp. formosa – mountain bush-clover
- Lespedeza thunbergii 'Pink Cascade' – pink bush-clover
- Lespedeza thunbergii 'Spring Grove' – bush-clover
- Lespedeza thunbergii 'White Fountain' – white bush-clover
- Leucanthemum ×superbum 'Becky' – Shasta daisy
- Leucojum aestivum – summer snowflake
- Leucojum aestivum 'Gravetye Giant' – summer snowflake
- Leucophyllum candidum (2018-245) – Texas sage
- Leucophyllum frutescens 'Green Cloud' – Texas sage
- Leucophyllum langmaniae
- Leucophyllum langmaniae (2013-0410) – Texas ranger
- Leucothoe racemosa – sweetbells
- Leycesteria formosa 'Jealousy' – golden pheasant bush
- Leymus arenarius 'Blue Dune' – blue lyme grass
- Liatris 'Alba'
- Liatris microcephala 'White Sprite' – white gayfeather
- Ligularia – ligularia
- Ligularia 'Hey, Mr. Wilson' – ligularia
- Ligularia kaialpina
- Ligustrum delavayanum – Delavay's privet
- Ligustrum japonicum 'Creme de Menthe' – wax leaf privet
- Ligustrum japonicum 'Green Meatball' – wax leaf privet
- Ligustrum japonicum 'Harmony Gardens' – wax leaf privet
- Ligustrum japonicum 'Little Moon' – dwarf wax leaf privet
- Ligustrum japonicum 'Silver Stars' – variegated Japanese privet
- Ligustrum 'NCLX1' – Golden Ticket sterile gold-leaved privet
- Ligustrum sinense 'Sunshine' – golden privet
- Ligustrum sinense 'Variegatum' – variegated Chinese privet
- Ligustrum sinense 'Wimbish' – Chinese privet
- Ligustrum tschonoskii 'Little Thomas' – privet
- Lilium
- Lilium 'Anastasia' – hybrid lily
- Lilium 'Arabian Knight'
- Lilium 'Beverly Dreams'
- Lilium 'Black Beauty' – oriental lily
- Lilium 'Bright Star'
- Lilium callosum – Lily
- Lilium 'Conca d'Or'
- Lilium formosanum – Formosa lily
- Lilium 'Fusion'
- Lilium Golden Splendor Group
- Lilium 'Graffity'
- Lilium henryi – Henry's lily
- Lilium 'Lady Alice'
- Lilium lancifolium 'Flore Pleno' – double tiger lily
- Lilium 'Leslie Woodriff' – oriental-trumpet lily
- Lilium lijiangense
- Lilium 'Lotus Beauty'
- Lilium 'Miss Feya'
- Lilium 'Muscadet'
- Lilium 'Orange Marmalade'
- Lilium 'Orange Tycoon'
- Lilium 'Orania' – Orienpet Lily
- Lilium poilanei (DJHV 19603) – lily
- Lilium 'Purple Dream'
- Lilium 'Red Alert' – hybrid lily
- Lilium 'Red Hot'
- Lilium sargentiae – Sargent's lily
- Lilium 'Satisfaction' – hybrid lily
- Lilium 'Scheherazade' – oriental-trumpet lily
- Lilium 'Snow Storm'
- Lilium 'Sunny Morning' – lily
- Lilium 'Touching'
- Lilium 'Triumphator'
- Lilium 'Yelloween' – Orienpet lily
- Lindelofia longiflora
- Lindera akoensis
- Lindera angustifolia – narrowleaf spicebush
- Lindera benzoin – spicebush
- Lindera communis – evergreen spicebush
- Lindera erythrocarpa – red-fruited spicebush
- Lindera fragrans – bamboo-leaf spicebush
- Lindera glauca – spicebush
- Lindera aff. limprichtii – evergreen spicebush
- Lindera praecox – Asian spicebush
- Lindera reflexa – mountain spicebush
- Lindera umbellata 'Togarashi' – kuro-moji spicebush
- Linum lewisii – Lewis flax
- Liquidambar acalycina 'Burgundy Flush' – Chinese sweet gum
- Liquidambar styraciflua 'Clydesform' – Emerald Sentinel columnar sweet gum
- Liquidambar styraciflua 'Gum Ball' – globe sweet gum
- Liquidambar styraciflua 'Slender Silhouette' – columnar sweet gum
- Liriodendron chinense – Chinese tuliptree
- Liriodendron chinense 'J. C. Raulston' – Chinese tuliptree
- Liriodendron tulipifera 'Ardis' – littleleaf tuliptree
- Liriope – lilyturf
- Liriope exiliflora 'Silver Dragon' – variegated lilyturf
- Liriope exiliflora 'Superba' – lilyturf
- Liriope gigantea – giant lilyturf
- Liriope gigantea 'Lynn Lowrey' – giant lilyturf
- Liriope graminifolia – lilyturf
- Liriope kansuensis – lily-turf
- Liriope longipedicellata 'Porcupine' – lilyturf
- Liriope minor 'Torafu' – striped lilyturf
- Liriope muscari – lilyturf
- Liriope muscari 'Bigun' – Cleopatra lilyturf
- Liriope muscari 'Blue Giant' – lilyturf
- Liriope muscari 'Exc 051' – Purple Explosion lilyturf
- Liriope muscari 'Gold Band' – lilyturf
- Liriope muscari 'Hawk's Feather' – striped lilyturf
- Liriope muscari 'Okina' – lilyturf
- Liriope muscari 'PeeDee Ingot' – yellow lilyturf
- Liriope muscari 'Samona' – lilyturf
- Liriope muscari 'Sideswiped' – striped lilyturf
- Liriope muscari (yellow splash) – lilyturf
- Liriope platyphylla – lilyturf
- Liriope aff. platyphylla – lilyturf
- Liriope spicata – lilyturf
- Liriope aff. spicata – lilyturf
- Lithocarpus brevicaudatus – Chinese lithocarp
- Lithocarpus edulis 'Starburst' – variegated Japanese tan-bark oak
- Lithocarpus fohaiensis
- Lithocarpus glaber – smooth tan-bark oak
- Lithocarpus henryi – Henry tan-bark oak
- Litsea auriculata
- Lobelia angulata
- Lobelia chinensis – Chinese lobelia
- Lobelia ×speciosa 'PAS1302712' – Starship Blue blue cardinal flower
- Lomandra longifolia 'Katrinus Deluxe'
- Lomandra longifolia 'Roma13' – Platinum Beauty basket grass
- Lomatia myricoides – river lomatia
- Lonicera ×americana 'Pam's Pink' – American honeysuckle
- Lonicera iberica – Caucasian honeysuckle
- Lonicera nitida 'Briliame' – Ophelia box honeysuckle
- Lonicera nitida 'Briloni' – Edmee Gold box honeysuckle
- Lonicera nitida 'Golden Glow' – Thunderbolt box honeysuckle
- Lonicera nitida 'Maigrün' – box honeysuckle
- Lonicera periclymenum
- Lonicera periclymenum 'Scentsation' – European honeysuckle
- Lonicera quinquelocularis – translucent honeysuckle
- Lonicera sempervirens (early blooming) – trumpet honeysuckle
- Lonicera sempervirens 'John Clayton' – trumpet honeysuckle
- Lonicera sempervirens 'Leo' – trumpet honeysuckle
- Lonicera similis var. delavayi – Delavay's honeysuckle
- Lonicera standishii – Standish's honeysuckle
- Lonicera standishii var. lancifolia – lance-flowered Standish's honeysuckle
- Lophanthus tibeticus – Tibetan lofant
- Lophospermum 'Magic Dragon'
- Loropetalum chinense 'Beni Hime' – Jazz Hands Mini Chinese fringe flower
- Loropetalum chinense var. chinense – white Chinese fringe flower
- Loropetalum chinense (Dodd form) – Chinese fringe flower
- Loropetalum chinense 'Green Elf' – compact Chinese fringe flower
- Loropetalum chinense 'Hakuou' – Jazz Hands Dwarf White Chinese fringe flower
- Loropetalum chinense 'Irodori' – Jazz Hands variegated Chinese fringe flower
- Loropetalum chinense 'Kurenai' – Jazz Hands Dwarf Pink Chinese fringe flower
- Loropetalum chinense 'NCI002' – Carolina Moonlight Chinese fringe flower
- Loropetalum chinense var. rubrum 'Bicolor' – purple-leaf Chinese fringe flower
- Loropetalum chinense var. rubrum 'Blush' – purple-leaf Chinese fringe flower
- Loropetalum chinense var. rubrum 'Daybreak's Flame' – purple-leaf Chinese fringe flower
- Loropetalum chinense var. rubrum 'Hines Purple Leaf' – Plum Delight purple-leaf Chinese fringe flower
- Loropetalum chinense var. rubrum 'Monraz' – Razzleberri purple-leaf Chinese fringe flower
- Loropetalum chinense var. rubrum 'Pipa's Red' – purple-leaf Chinese fringe flower
- Loropetalum chinense var. rubrum (Piroche form) – purple-leaf Chinese fringe flower
- Loropetalum chinense var. rubrum 'Ruby' – purple-leaf Chinese fringe flower
- Loropetalum chinense var. rubrum 'Sizzlin' Pink' – purple-leaf Chinese fringe flower
- Loropetalum chinense var. rubrum 'sPg-3-017' – Garnet Fire purple-leaf Chinese fringe flower
- Loropetalum chinense var. rubrum 'Suzanne' – purple-leaf Chinese fringe flower
- Loropetalum chinense var. rubrum (variegated) – purple-leaf Chinese fringe flower
- Loropetalum chinense var. rubrum 'Zhuzhou Fuchsia' – purple-leaf Chinese fringe flower
- Loropetalum chinense 'Shang-hi' – Purple Diamond compact Chinese fringe flower
- Loropetalum chinense 'Shang-lo' – Purple Pixie dwarf Chinese fringe flower
- Loropetalum chinense 'Shang-Red' – Red Diamond purple-leaf Chinese fringe flower
- Loropetalum chinense 'Shang-White' – Emerald Snow dwarf Chinese fringe flower
- Loropetalum chinense 'Shidare' – weeping Chinese fringe flower
- Loropetalum chinense 'Snow Dance' – white Chinese fringe flower
- Loropetalum chinense 'Tokyo Weeping' – weeping Chinese fringe flower
- Lotus corniculatus 'Plenus' – bird's-foot trefoil
- Ludwigia maritima 'Life's a Beach'
- Lunaria annua – moneyplant
- Lunaria annua variegata – moneyplant
- Lychnis coronaria 'Blood Red' – rose campion
- Lycium barbarum 'Firecracker' – goji berry
- Lycoris – surprise lily
- Lycoris (17-242)
- Lycoris (17-244)
- Lycoris (17-245)
- Lycoris (17-250) – surprise lily
- Lycoris (17-251)
- Lycoris (17-252)
- Lycoris (17-255)
- Lycoris (17-260)
- Lycoris (17-83?)
- Lycoris 'Albi Pink'
- Lycoris albiflora – white surprise-lily
- Lycoris albiflora 'Dorman'
- Lycoris ×albiflora 'Phil's Gold'
- Lycoris albiflora 'Summer Passion' – summer passion surprise lily
- Lycoris anhuiensis
- Lycoris aurea – hurricane lily
- Lycoris chinensis – golden surprise-lily
- Lycoris chinensis × L. sprengeri
- Lycoris ×elsiae – salmon surprise-lily
- Lycoris incarnata – candy-cane surprise-lily
- Lycoris longituba var. longituba – long-tube surprise-lily
- Lycoris radiata – spider lily
- Lycoris radiata var. pumila 'Fourth of July' – spider lily
- Lycoris radiata var. radiata – spider lily
- Lycoris radiata var. radiata 'Modern Japanese' – spider lily
- Lycoris ×rosea – surprise lily
- Lycoris ×rosea 'Magenta Magic' – surprise lily
- Lycoris sprengeri – tie-dye surprise-lily
- Lycoris squamigera – surprise lily
- Lycoris straminea – staw surprise-lily
- Lycoris straminea (pink sport)
- Lycoris ×straminea 'Strawberry Lemonade'
- Lycoris traubii
- Lysimachia alfredii 'Night Light' – moneywort
- Lysimachia clethroides 'Heronswood Gold' – gooseneck
- Lysimachia congestiflora 'Persian Chocolate' – golden globes
- Lysimachia nummularia 'Aurea' – creeping Jenny
- Lysimachia paridiformis var. stenophylla – Sichuan loosestrife
- Lysimachia paridiformis var. stenophylla 'Jens Nilson Giant' – Sichuan loosestrife
- Lysionotus
- Lysionotus 'Pudding' – yellow gesneriad
- Maackia tenuifolia – maackia
- Machilus thunbergii – Japanese bay tree
- Magnolia
- Magnolia amabilis – evergreen michelia
- Magnolia 'Anticipation' – Kehr hybrid magnolia
- Magnolia 'Blazing Beauty'
- Magnolia 'Brass Monkey' – evergreen magnolia
- Magnolia ×brooklynensis 'Evamaria' – Brooklyn magnolia
- Magnolia ×brooklynensis 'Woodsman' – Brooklyn magnolia
- Magnolia 'Canary Cheers'
- Magnolia cavaleriei – evergreen magnolia
- Magnolia cavaleriei var. platypetala – broad petal michelia
- Magnolia changhungtana × M. insignis
- Magnolia chapensis – Chapa michelia
- Magnolia 'Coral Lake' – Leach hybrid magnolia
- Magnolia cylindrica – Yellow Mountain magnolia
- Magnolia cylindrica (OP from yellow form)
- Magnolia 'Daybreak' – Kehr hybrid magnolia
- Magnolia delavayi (pink flower form) – Father Delavay's evergreen magnolia
- Magnolia denudata 'Forrest's Pink' – pink Yulan magnolia
- Magnolia elegantifolia × M. figo 'Twiggy' – hybrid magnolia
- Magnolia 'Elizabeth' – yellow magnolia
- Magnolia ernestii – yellow lily-tree
- Magnolia ernestii subsp. szechuanica – Sichuan michelia
- Magnolia 'Eskimo' – Kehr hybrid magnolia
- Magnolia 'Eternal Spring' – evergreen magnolia
- Magnolia figo var. crassipes × (M. foveolata × M. laevifolia)
- Magnolia figo var. crassipes 'Purple Queen' – purple-flowered banana shrub
- Magnolia figo 'Hagiwara Everblooming' – banana shrub
- Magnolia figo 'Stellar Ruby' – banana shrub
- Magnolia figo 'Stubbs Purple' – banana shrub
- Magnolia ×foggii 'Picotee' – hybrid magnolia
- Magnolia fordiana – tree lotus
- Magnolia foveolata (golden form)
- Magnolia 'Freeman' – hybrid magnolia
- Magnolia 'Galaxy' – U.S. National Arboretum hybrid magnolia
- Magnolia 'Goldfinch' – hybrid magnolia
- Magnolia 'Gorgeous' – deciduous magnolia
- Magnolia grandiflora 'Baby Doll' – southern magnolia
- Magnolia grandiflora 'Emerald Spire' – southern magnolia
- Magnolia grandiflora 'Ferruginea' – southern magnolia
- Magnolia grandiflora 'Goliath' – southern magnolia
- Magnolia grandiflora 'Hasse' – upright southern magnolia
- Magnolia grandiflora 'Kay Parris' – southern magnolia
- Magnolia grandiflora 'Leanne' – southern magnolia
- Magnolia grandiflora 'Little Gem' – southern magnolia
- Magnolia grandiflora 'Poconos' – southern magnolia
- Magnolia grandiflora 'Pygmaea' – southern magnolia
- Magnolia grandiflora 'Silver Savage' – southern magnolia
- Magnolia grandiflora 'Southern Charm' – Teddy Bear southern magnolia
- Magnolia grandiflora 'Southern Pride' – southern magnolia
- Magnolia grandiflora 'STRgra' × M. grandiflora 'Kay Parris' – hybrid magnolia
- Magnolia grandiflora 'TMGH' – Alta columnar southern magnolia
- Magnolia grandiflora (variegated form) – variegated southern magnolia
- Magnolia grandiflora 'Victoria' – southern magnolia
- Magnolia (hybrid No. 3)
- Magnolia 'Ian's Red' – deciduous magnolia
- Magnolia 'Iolanthe' – Jury hybrid magnolia
- Magnolia 'Jon Jon' – Gresham hybrid magnolia
- Magnolia 'Judy Zuk' – yellow flowered magnolia
- Magnolia 'Katie-O Early' – hybrid magnolia
- Magnolia ×kewensis 'Wada's Memory' – Kew magnolia
- Magnolia 'KLMWW'
- Magnolia kobus 'Kimitsu Hime' – kobus magnolia
- Magnolia kwangtungensis – Chinese manglietia
- Magnolia laevifolia – shrubby michelia
- Magnolia laevifolia 'Gail's Favourite' – shrubby michelia
- Magnolia laevifolia 'Michelle' – shrubby michelia
- Magnolia laevifolia 'Snowbird' – shrubby michelia
- Magnolia 'Legend' – Leach hybrid magnolia
- Magnolia liliiflora 'Minnie Mouse' – lily magnolia
- Magnolia ×loebneri 'Ballerina' – Loebner magnolia
- Magnolia ×loebneri 'Green Mist' – hybrid magnolia
- Magnolia ×loebneri 'Leonard Messel' – Loebner magnolia
- Magnolia ×loebneri 'Merrill' – Loebner magnolia
- Magnolia ×loebneri 'Neil McEachern' – Loebner magnolia
- Magnolia ×loebneri 'Willowwood' – Loebner magnolia
- Magnolia 'Lois' – Brooklyn Botanic Garden hybrid magnolia
- Magnolia lotungensis – eastern joy lotus tree
- Magnolia (M. foveolata × M. laevifolia) (Clone M) × M. figo var. crassipes
- Magnolia (M. laevifolia × M. champaca) × (M. laevifolia × M. maudiae)
- Magnolia macclurei
- Magnolia macrophylla – bigleaf magnolia
- Magnolia macrophylla var. ashei – Ashe's magnolia
- Magnolia 'Maryland' – Freeman hybrid magnolia
- Magnolia maudiae – smiling forest michelia
- Magnolia (maudiae × 'Lucky')
- Magnolia 'MICjur01' – Fairy Magnolia Blush hybrid magnolia
- Magnolia 'Nimbus' – hybrid magnolia
- Magnolia 'Peppermint Stick' – Gresham hybrid magnolia
- Magnolia 'Pink Delight' – Ledvina hybrid magnolia
- Magnolia 'Pink Goblet' – Gresham hybrid magnolia
- Magnolia 'Pristine' – McDaniel hybrid magnolia
- Magnolia 'Purple Star Power' – hybrid magnolia
- Magnolia 'RLH-MFL-1' – Coppertallica magnolia
- Magnolia 'Rose Marie' × M. 'Genie' – hybrid magnolia
- Magnolia 'Rose Marie' × M. 'Ian's Red' – magnolia
- Magnolia salicifolia 'Miss Jack' – anise magnolia
- Magnolia sapaensis – Sapa magnolia
- Magnolia sapaensis × M. conifera
- Magnolia 'Serendipity' – evergreen magnolia
- Magnolia (Shanghai/Liu hybrid)
- Magnolia sieboldii 'Colossus' – Oyama magnolia
- Magnolia sieboldii 'Colossus' × M. grandiflora 'Kay Parris' – hybrid magnolia
- Magnolia sieboldii 'Colossus' × M. insignis – hybrid magnolia
- Magnolia 'Silk Road' × M. insignis – hybrid Magnolia
- Magnolia ×soulangeana 'JURmag1' – Black Tulip saucer magnolia
- Magnolia ×soulangeana 'Lilliputian' – saucer magnolia
- Magnolia ×soulangeana 'Pickard's Opal' – saucer magnolia
- Magnolia ×soulangeana 'Picture' – saucer magnolia
- Magnolia ×soulangeana 'Speciosa' – saucer magnolia
- Magnolia ×soulangeana 'Sundew' – saucer magnolia
- Magnolia ×soulangeana 'Verbanica' – saucer magnolia
- Magnolia 'Spartan Spirit' – magnolia
- Magnolia 'Spectrum' – U.S. National Arboretum hybrid magnolia
- Magnolia sprengeri – Sprenger magnolia
- Magnolia 'Stellar Acclaim' – Kehr hybrid magnolia
- Magnolia stellata – star magnolia
- Magnolia stellata 'Chrysanthemumiflora' – many-petalled star magnolia
- Magnolia stellata 'Pickard's Stardust' – star magnolia
- Magnolia stellata 'Scented Silver' – star magnolia
- Magnolia stellata 'Waterlily' – many-petalled star magnolia
- Magnolia 'Sun Ray' – Kehr hybrid magnolia
- Magnolia 'Sun Spire' – Kehr hybrid magnolia
- Magnolia 'Sunsation' – Kehr hybrid magnolia
- Magnolia tamaulipana
- Magnolia virginiana – sweet bay
- Magnolia virginiana var. australis 'Coosa' – littleleaf sweet bay magnolia
- Magnolia virginiana var. australis 'Green Shadow' – sweet bay magnolia
- Magnolia virginiana var. australis 'Jim Wilson' – Moonglow sweet bay magnolia
- Magnolia virginiana var. australis (Louisiana form) – sweet bay magnolia
- Magnolia virginiana var. australis 'Perry Paige' – Sweet Thing dwarf sweet bay magnolia
- Magnolia virginiana (Dodd small leaf form) – sweet bay magnolia
- Magnolia virginiana × M. insignis – hybrid magnolia
- Magnolia virginiana 'Mt. Pulaski' – sweetbay magnolia
- Magnolia virginiana (SCC Texas/Louisiana form) × M. grandiflora 'Kay Parris' – hybrid magnolia
- Magnolia virginiana 'Silver Mist' – sweet bay magnolia
- Magnolia 'Winelight' – Gresham hybrid magnolia
- Magnolia xinganensis
- Magnolia 'Yellow Fever' – yellow magnolia
- Magnolia 'Yellow Lantern' – yellow magnolia
- Magnolia zenii – Zen magnolia
- Mahonia – leatherleaf mahonia
- Mahonia 'Arthur Menzies' – hybrid leatherleaf mahonia
- Mahonia bealei – leatherleaf mahonia
- Mahonia bodinieri – Bodinier's grape holly
- Mahonia duclouxiana
- Mahonia ×emeiensis 'Emei Shan'
- Mahonia ×emeiensis (Ogisu)
- Mahonia eurybracteata – narrow-leaf grape holly
- Mahonia eurybracteata (Cistus silver)
- Mahonia eurybracteata subsp. ganpinensis – grape holly
- Mahonia eurybracteata subsp. ganpinensis 'Soft Caress' – grape holly
- Mahonia eurybracteata 'Narihira' – narrowleaf mahonia
- Mahonia (ex. bodinieri) – leatherleaf mahonia
- Mahonia fargesii
- Mahonia cf. fargesii
- Mahonia fortunei – Fortune's Mahonia
- Mahonia fremontii – Fremont's mahonia
- Mahonia 'Golden Cascade' – mahonia
- Mahonia gracilipes – Chinese mahonia
- Mahonia gracilis – Mexican barberry
- Mahonia haematocarpa – algerita
- Mahonia ilicina – grape holly
- Mahonia japonica – Japanese mahonia
- Mahonia japonica 'Hivernant' – Japanese mahonia
- Mahonia ×lindsayae 'Cantab' – fragrant mahonia
- Mahonia 'Marvel' – hybrid mahonia
- Mahonia 'McCracken's Seedling' – grape holly
- Mahonia ×media 'Buckland' – Oregon grape
- Mahonia ×media 'Charity' – Oregon grape
- Mahonia ×media 'Lionel Fortescue' – Oregon grape
- Mahonia ×media 'Underway' – Oregon grape
- Mahonia ×media 'Winter Sun' – Oregon grape
- Mahonia napaulensis 'Maharajah' – Nepalese Mahonia
- Mahonia 'NCMH1' – Good Vibes / Funky Flow mahonia
- Mahonia 'NCMH2' – Groovy Glow mahonia
- Mahonia nitens – Chinese mahonia
- Mahonia oiwakensis – Chinese mahonia
- Mahonia shenii
- Mahonia 'sPg-3-071' – Beijing Beauty grape holly
- Mahonia tikushiensis – Japanese mahonia
- Mahonia trifoliolata – agarita
- Mahonia (Yucca Do hybrids) – grape holly
- Maihuenia poeppigii – Maihuén
- Malus – crabapple
- Malus doumeri
- Malus 'JFS KW139MX' – Ruby Dayze crabapple
- Malus 'JFS KW213MX' – Raspberry Spear upright crabapple
- Malus 'JFS KW214MX' – Ivory Spear crabapple
- Malus 'JFS KW218MX' – Snow Crystal crabapple
- Malus 'JFS-KW207' – Sparkling Sprite dwarf crabapple
- Malus micromalus – Kaido crab apple
- Malus 'Royal Beauty' – crabapple
- Malvaviscus arboreus var. drummondii – Turk's cap
- Malvaviscus arboreus var. drummondii 'Big Momma' – Drummond's wax mallow
- Malvaviscus arboreus var. drummondii 'Pam Puryear' – Turk's cap
- Malvaviscus arboreus var. drummondii (pink) – pink turk's cap
- Mammillaria heyderi var. nova
- Manettia cordifolia – firecracker vine
- Manettia cordifolia 'John Elsley' – firecracker vine
- Manfreda – deciduous agave
- Manfreda 'Helen Wynans' – deciduous agave
- Manfreda maculosa – spice-lily
- Manfreda undulata 'Chocolate Chips' – deciduous agave
- Manfreda variegata (Tamazunchale site) – deciduous agave
- ×Mangave 'Catch a Wave' – mangave
- ×Mangave 'Ink Blot'
- ×Mangave 'Kaleidoscope'
- ×Mangave 'Mission to Mars' – mangave
- ×Mangave 'My Dog Spot'
- ×Mangave 'Painted Desert'
- ×Mangave 'Purple People Eater'
- ×Mangave 'Queen for a Day' – mangave
- ×Mangave 'Shadow Waltz'
- ×Mangave 'Silver Fox' – mangave
- ×Mangave 'Snow Leopard' – mangave
- ×Mangave 'Whale Tale' – mangave
- Mazus reptans – creeping mazus
- Mazus reptans 'Albus' – white creeping mazus
- Melia azedarach 'Jade Snowflake' – variegated Chinaberry
- Melia toosendan – Chinaberry
- Melinis nerviglumis
- Meliosma oldhamii – Oldham's meliosma
- Meliosma parviflora – small flowered melliosma
- Melliodendron xylocarpum 'Momoka' – Chinese parasol storax
- Mespilus canescens – Stern's medlar
- Metapanax davidii – David false-ginseng
- Metapanax delavayi – Delavay false-ginseng
- Metapanax delavayi (DJHC 181)
- Metapanax delavayi 'Stout'
- Metasequoia glyptostroboides – dawn redwood
- Metasequoia glyptostroboides 'Hamlet's Broom' – dwarf dawn redwood
- Metasequoia glyptostroboides 'Schirrmann's Nordlicht' – dwarf dawn redwood
- Metasequoia glyptostroboides 'Sheridan Spire' – dawn redwood
- Metasequoia glyptostroboides 'Silhouette' – variegated dawn redwood
- Metasequoia glyptostroboides 'WAH-08AG' – Amber Glow dawn redwood
- Metathelypteris flaccida – Bombadil's fern
- Microchirita micromusa
- Microlepia strigosa f. crispa 'Shishi' – lion's mane fern
- Microlepia strigosa 'MacFaddeniae' – rigid lace fern
- Microsorum brachylepis 'Datun' – pinyin fern
- Millettia pulchra – summer wisteria
- Mirabilis jalapa 'Baywatch' – four o'clock
- Mirabilis longiflora – sweet four o'clock
- Miscanthus floridulus – giant maiden grass
- Miscanthus 'Ncms1' – My Fair Maiden maiden grass
- Miscanthus sacchariflorus 'Gotemba Gold' – Amur silvergrass
- Miscanthus sinensis 'Adagio' – compact maiden grass
- Miscanthus sinensis 'Bandwidth'
- Miscanthus sinensis 'Little Zebra' – maiden grass
- Miscanthus sinensis 'Strictus'
- Miscanthus transmorrisonensis – maiden grass
- Miyamayomena koraiensis – Korean starwort
- Miyamayomena savatieri 'Edo Murasaki' – Edo Muraski Japanese aster
- Molinia caerulea subsp. arundinacea 'Skyracer'
- Monarda 'Bessie Bryant' – hybrid bee balm
- Monarda 'Fireball' – dwarf red beebalm
- Monarda fistulosa × M. bartlettii 'Peter's Purple' – Peter's purple bee balm
- Monarda 'Leading Lady Plum' – bee balm
- Monarda 'Purple Rooster'
- Monardella villosa
- Moraea collina – Cape tulip
- Moraea polystachya – butterfly iris
- Morella cerifera 'Blue Candles' – southern wax myrtle
- Morella cerifera var. pumila – dwarf southern wax myrtle
- Morella cerifera 'Soft Cloud' – dwarf southern wax myrtle
- Morella cerifera 'Soleil' – golden southern wax myrtle
- Morella cerifera 'Strawberry Shortcake' – southern wax myrtle
- Morella cerifera 'Waccamaw Pancake' – wax myrtle
- Morella pumila (Liberty Co, FL) – dwarf bayberry
- Morus alba 'Ho-o' – royal white mulberry
- Muehlenbeckia axillaris 'Tricolor' – creeping wire vine
- Muhlenbergia capillaris – muhly grass
- Muhlenbergia emersleyi – bullgrass
- Muhlenbergia lindheimeri – big muhly
- Muhlenbergia 'Pink Flamingos' – hybrid muhly grass
- Muhlenbergia reverchonii – seep muhly
- Muhlenbergia reverchonii 'PUND01S' – Undaunted seep muhly
- Musa balbisiana – plantain
- Musa basjoo – textile banana
- Musa 'Helen's Hybrid' – banana
- Musa 'Longleaf Garnet' – ornamental banana
- Musa mannii
- Musa ornata × velutina
- Musa 'Picasso' – hybrid banana
- Musa sikkimensis – Darjeeling banana
- Musa velutina – velvet pink banana
- Muscari
- Muscari armeniacum 'Blue Spike'
- Muscari armeniacum 'Christmas Pearl' – common grape hyacinth
- Muscari armeniacum 'Fantasy Creation'
- Muscari armeniacum 'Saffier'
- Muscari armeniacum 'Valerie Finnis'
- Muscari armeniacum 'Venus'
- Muscari aucheri 'Dark Eyes' – Aucher-Eloy grape hyacinth
- Muscari aucheri 'Mount Hood' – Aucher-Eloy grape hyacinth
- Muscari azureum
- Muscari macrocarpum 'Golden Fragrance' – yellow grape hyacinths
- Muscari muscarimi – musk grape hyacinth
- Muscari neglectum
- Muscari neglectum 'Baby's Breath'
- Muscari 'Peppermint'
- Muscari 'Pink Sunrise'
- Muscari 'Sky Blue'
- Musella lasiocarpa – golden lotus banana
- Musella lasiocarpa var. rubribracteata
- Myosotis arvensis – field forget-me-not
- Myriopteris lanosa – hairy lip fern
- Myriopteris yavapensis – graceful lip fern
- Myrospermum sousanum – arroyo sweetwood
- Myrsine africana – African boxwood
- Myrtus communis 'Andy's Hardy' – sweet myrtle
- Myrtus communis 'Little Elizabeth' – common myrtle
- Nageia nagi – broad-leaved podocarpus
- Nageia nagi 'Blue Gator' – nagi
- Nageia nagi (white streaked) – variegated nagi
- Nageia aff. nankoensis
- Nandina domestica – heavenly bamboo
- Nandina domestica 'Aka' – Blush Pink dwarf heavenly bamboo
- Nandina domestica 'Aka Chirimen' – threadleaf heavenly bamboo
- Nandina domestica (aphyllous) – heavenly bamboo
- Nandina domestica 'Aurea' – yellow-berry heavenly bamboo
- Nandina domestica 'Chidori' – threadleaf heavenly bamboo
- Nandina domestica 'Compacta' – dwarf heavenly bamboo
- Nandina domestica (dwarf upright) – dwarf heavenly bamboo
- Nandina domestica 'Enshu' – heavenly bamboo
- Nandina domestica 'Firepower' – dwarf heavenly bamboo
- Nandina domestica 'Greray' – Sunray compact nandina
- Nandina domestica 'Gulf Stream' – compact heavenly bamboo
- Nandina domestica 'Harbour Dwarf' – dwarf heavenly bamboo
- Nandina domestica 'Jaytee' – Harbor Belle dwarf heavenly bamboo
- Nandina domestica 'Kurijuse' – threadleaf nandina
- Nandina domestica 'Lemon Lime' – heavenly bamboo
- Nandina domestica 'Leucocarpa' – yellow-berried heavenly bamboo
- Nandina domestica 'Monfar' – Sienna Sunrise compact heavenly bamboo
- Nandina domestica 'Moon Bay' – compact heavenly bamboo
- Nandina domestica 'Murasaki' – Flirt dwarf heavenly bamboo
- Nandina domestica 'Nana Purpurea' – dwarf heavenly bamboo
- Nandina domestica 'Okame' – heavenly bamboo
- Nandina domestica 'Ori Zuru' – contorted leaf heavenly bamboo
- Nandina domestica 'Otafuku' – variegated heavenly bamboo
- Nandina domestica 'Pygmaea' – dwarf heavenly bamboo
- Nandina domestica (Raulston hybrid No. 2) – narrowleaf heavenly bamboo
- Nandina domestica 'Royal Princess' – heavenly bamboo
- Nandina domestica 'San Gabriel' – threadleaf heavenly bamboo
- Nandina domestica 'Seika' – Obsession compact heavenly bamboo
- Nandina domestica 'Senbazuru' – threadleaf heavenly bamboo
- Nandina domestica 'Shiro Ikada' – white fruited heavenly bamboo
- Nandina domestica 'Shiromi Orizuru' – heavenly bamboo
- Nandina domestica 'Soga Ikada' – heavenly bamboo
- Nandina domestica 'Southern Lace' – narrowleaf heavenly bamboo
- Nandina domestica 'Taki-no-Kawa' – heavenly bamboo
- Nandina domestica 'Tamazuru' – heavenly bamboo
- Nandina domestica 'Tancho Zuru' – heavenly bamboo
- Nandina domestica 'Towne and Country' – heavenly bamboo
- Nandina domestica 'Twilight' – heavenly bamboo
- Nandina domestica (twisted leaf) – heavenly bamboo
- Nandina domestica (twisted leaf, peach fruit) – heavenly bamboo
- Nandina domestica 'Umpqua Chief' – heavenly bamboo
- Nandina domestica 'Umpqua Princess' – heavenly bamboo
- Nandina domestica 'Umpqua Warrior' – heavenly bamboo
- Nandina domestica (variegated) – variegated heavenly bamboo
- Nandina domestica 'Winter Pearl' – heavenly bamboo
- Nandina domestica 'Wood's Dwarf' – dwarf heavenly bamboo
- Narcissus – daffodil
- Narcissus 'Abba' – double daffodil
- Narcissus 'Acropolis' – double daffodil
- Narcissus 'Actaea' – poeticus daffodil
- Narcissus 'Aflame' – small-cupped daffodil
- Narcissus 'Albus Plenus Odoratus' – daffodil
- Narcissus 'Altruist' – small cup daffodil
- Narcissus 'Apricot Whirl'
- Narcissus 'Art Design'
- Narcissus 'Ascot' – double daffodil
- Narcissus 'Aspasia' – tazetta daffodil
- Narcissus 'Baby Boomer'
- Narcissus 'Baby Moon' – miniature jonquilla daffodil
- Narcissus 'Ballintoy' – large-cupped daffodil
- Narcissus 'Barenwyn'
- Narcissus 'Barrett Browning' – small-cupped daffodil
- Narcissus 'Bartley' – cyclamineus daffodil
- Narcissus 'Beautiful Eyes' – jonquil
- Narcissus 'Bella Vista' – daffodil
- Narcissus 'Beryl' – cyclamineus daffodil
- Narcissus 'Bittern' – small-cupped daffodil
- Narcissus 'Blushing Lady' – jonquilla daffodil
- Narcissus 'Border Chief' – large-cupped daffodil
- Narcissus 'Border Legend' – large cupped daffodil
- Narcissus 'Bravoure'
- Narcissus 'Can Can Girl' – daffodil
- Narcissus 'Canaliculatus' – tazetta daffodil
- Narcissus 'Canarybird' – tazetta daffodil
- Narcissus 'Cassata' – collar daffodil
- Narcissus 'Cha Cha' – cyclamineus daffodil
- Narcissus 'Chanterelle' – collar daffodil
- Narcissus 'Chinese Ivory'
- Narcissus 'Chinita' – daffodil
- Narcissus 'Chit Chat' – jonquilla daffodil
- Narcissus 'Congress' – collar daffodil
- Narcissus 'Court Martial' – large-cupped daffodil
- Narcissus 'Cum Laude' – daffodil
- Narcissus 'Cyclataz'
- Narcissus 'Cyclops' – small-cupped daffodil
- Narcissus 'Dancing Moonlight'
- Narcissus 'Daphne'
- Narcissus 'Derringer'
- Narcissus 'Diamond Ring'
- Narcissus 'Doctor Alex Fleming' – large-cupped daffodil
- Narcissus 'Doll Baby'
- Narcissus 'Dolly Mollinger' – papillon daffodil
- Narcissus 'Double Smilies'
- Narcissus 'Dreamlight' – small-cupped daffodil
- Narcissus 'Dutch Master' – trumpet daffodil
- Narcissus 'Early Splendour' – tazetta daffodil
- Narcissus 'Eastern Dawn' – large-cupped daffodil
- Narcissus 'Electrus'
- Narcissus 'Elka'
- Narcissus 'Elvin's Voice'
- Narcissus 'Exotic Mystery' – daffodil
- Narcissus 'Falconet' – tazetta daffodil
- Narcissus 'February Gold' – cyclamineus daffodil
- Narcissus fernandesii – Fernandes daffodil
- Narcissus fernandesii var. cordubensis
- Narcissus 'Finch' – jonquilla daffodil
- Narcissus 'Firestreak' – papillon daffodil
- Narcissus 'Flower Record' – large-cupped daffodil
- Narcissus 'Fortissimo' – large-cupped daffodil
- Narcissus 'Fortune' – large-cupped daffodil
- Narcissus 'Fragrant Rose' – large-cupped daffodil
- Narcissus 'Garden Club of America'
- Narcissus 'Garden Fringe'
- Narcissus 'General Patton' – trumpet daffodil
- Narcissus 'Geranium' – tazetta daffodil
- Narcissus 'Golden Bells' – hoop petticoat daffodil
- Narcissus 'Golden Dawn' – tazetta daffodil
- Narcissus 'Golden Echo'
- Narcissus 'Golden Quince' – miniature daffodil
- Narcissus 'Golden Sceptre' – jonquilla daffodil
- Narcissus 'Golden Sunbeam' – trumpet daffodil
- Narcissus 'Goose Green'
- Narcissus 'Grower's Pride'
- Narcissus 'Halvose' – tazetta daffodil
- Narcissus 'Hathor' – jonquilla daffodil
- Narcissus 'Hawera' – miniature daffodil
- Narcissus 'Heart to Heart'
- Narcissus 'Hillstar' – jonquilla daffodil
- Narcissus 'Honolulu' – double daffodil
- Narcissus 'Ice Follies' – large-cupped daffodil
- Narcissus 'Itzim'
- Narcissus 'Jenny' – cyclamineus daffodil
- Narcissus jonquilla 'Flore Pleno'
- Narcissus jonquilla var. henriquesii – miniature daffodil
- Narcissus 'Jules Verne' – large-cupped daffodil
- Narcissus 'Julia Jane' – hoop petticoat daffodil
- Narcissus 'Kapiti Peach'
- Narcissus 'Kassels Gold' – trumpet daffodil
- Narcissus 'Katie Heath' – triandus daffodil
- Narcissus 'Kokopelli'
- Narcissus 'La Belle'
- Narcissus 'Lancaster'
- Narcissus 'Larkwhistle' – cyclamineus daffodil
- Narcissus 'Laurens Koster' – tazetta daffodil
- Narcissus 'Lemon Beauty' – papillon daffodil
- Narcissus 'Liberty Bells' – triandrus daffodil
- Narcissus 'Little Gem'
- Narcissus 'Little Oliver'
- Narcissus 'Little Rusky'
- Narcissus 'Littlefield'
- Narcissus 'Lucky Number'
- Narcissus ×macleayi
- Narcissus 'Mallee'
- Narcissus 'Manon Lescaut' – large-cupped daffodil
- Narcissus 'Martinette' – jonquilla
- Narcissus 'Mary Gay Lirette' – collar daffodil
- Narcissus 'Matapan' – small-cupped daffodil
- Narcissus 'Merels Favorite'
- Narcissus 'Merlin'
- Narcissus 'Midget'
- Narcissus 'Minnow' – tazetta daffodil
- Narcissus 'Mint Julep' – small-cupped daffodil
- Narcissus 'Mite' – cyclaminius daffodil
- Narcissus 'Modern Art' – large-cupped daffodil
- Narcissus 'Mon Cherie' – large-cupped daffodil
- Narcissus 'Monal' – large-cupped daffodil
- Narcissus 'More and More' – trumpet daffodil
- Narcissus 'Mount Hood' – trumpet daffodil
- Narcissus 'New-Baby' – miniature jonquilla daffodil
- Narcissus 'Night Cap' – large-cupped daffodil
- Narcissus 'Obdam' – double daffodil
- Narcissus obvallaris – Tenby daffodil
- Narcissus 'Odoratus'
- Narcissus ×odorus – Queen Anne's double jonquil
- Narcissus ×odorus 'Flore Pleno' – daffodil
- Narcissus ×odorus 'Plenus' – daffodil
- Narcissus 'Orange Cockade' – small-cupped daffodil
- Narcissus 'Orange Comet'
- Narcissus 'Orange Frilled' – large-cupped daffodil
- Narcissus 'Oxford Gold'
- Narcissus 'Pacific Coast' – miniature daffodil
- Narcissus 'Palmares' – collar daffodil
- Narcissus 'Pappy George' – jonquilla daffodil
- Narcissus papyraceus – paper-white narcissus
- Narcissus 'Parisienne' – collar daffodil
- Narcissus 'Park Tropical'
- Narcissus 'Passionale' – large-cupped daffodil
- Narcissus 'Peaches and Cream' – large-cupped daffodil
- Narcissus 'Pencrebar' – double daffodil
- Narcissus 'Pet Finch' – jonquilla daffodil
- Narcissus 'Pink Charm' – large-cupped daffodil
- Narcissus 'Pink Paradise' – double daffodil
- Narcissus poeticus var. recurvus – pheasant's eye daffodil
- Narcissus 'Polar Ice' – small-cupped daffodil
- Narcissus 'Popeye'
- Narcissus 'Precocious' – large-cupped daffodil
- Narcissus pseudonarcissus subsp. moschatus – daffodil
- Narcissus 'Pueblo' – jonquilla daffodil
- Narcissus 'Rapture'
- Narcissus 'Red Curtain' – trumpet daffodil
- Narcissus 'Rijnveld's Early Sensation' – trumpet daffodil
- Narcissus 'Rikki' – jonquilla daffodil
- Narcissus 'Rip van Winkle' – double daffodil
- Narcissus romieuxii
- Narcissus 'Roseanna' – large-cupped daffodil
- Narcissus rupicola 'Yellow Pearl'
- Narcissus 'Sabrosa'
- Narcissus 'Sailboat' – jonquilla daffodil
- Narcissus 'Sailorman'
- Narcissus 'Satin Pink' – large-cupped daffodil
- Narcissus 'Scarlet Royal' – large-cupped daffodil
- Narcissus 'Sempre Avanti' – large-cupped daffodil
- Narcissus 'Silver Chimes' – tazetta daffodil
- Narcissus 'Silver Smiles'
- Narcissus 'Sir Winston Churchill' – double daffodil
- Narcissus 'Slice of Life'
- Narcissus 'Small Talk' – trumpet daffodil
- Narcissus 'Smiling Sun'
- Narcissus 'Smiling Twin'
- Narcissus 'Snow Baby'
- Narcissus 'Sorbet' – collar daffodil
- Narcissus 'Sound' – large-cupped daffodil
- Narcissus 'Spoirot' – miniature daffodil
- Narcissus 'Starlight Sensation'
- Narcissus 'Stint' – triandrus daffodil
- Narcissus 'Stratosphere' – jonquilla daffodil
- Narcissus 'Sugarbush' – jonquilla daffodil
- Narcissus 'Sun Disc'
- Narcissus 'Sunlight Sensation' – triandrus daffodil
- Narcissus 'Surfside' – cyclamineus daffodil
- Narcissus 'Suzy' – jonquilla daffodil
- Narcissus 'Sweet Ocean'
- Narcissus 'Sweet Smiles'
- Narcissus 'Sweetness'
- Narcissus 'Tahiti' – double daffodil
- Narcissus 'Telamonius'
- Narcissus 'Telamonius Plenus' – Scrambled Eggs
- Narcissus 'Tête Bouclé'
- Narcissus 'Tête-à-Tête' – miniature daffodil
- Narcissus 'Thalia' – triandrus daffodil
- Narcissus 'Tiny Bubbles' – daffodil
- Narcissus 'Tittle Tattle' – jonquilla daffodil
- Narcissus 'Trepolo'
- Narcissus 'Tresamble' – triandrus daffodil
- Narcissus 'Trevithian'
- Narcissus 'Tricollet' – collar daffodil
- Narcissus 'Tropical Sunset'
- Narcissus 'Tullybeg' – small-cupped daffodil
- Narcissus 'Twinkling Yellow'
- Narcissus 'Ultimus' – large-cupped daffodil
- Narcissus 'Unsurpassable' – trumpet daffodil
- Narcissus 'Valdrome' – collar daffodil
- Narcissus 'Victoria von dem Busche'
- Narcissus 'Virginia Sunrise' – large-cupped daffodil
- Narcissus 'W.P. Milner' – trumpet daffodil
- Narcissus 'White Petticoat'
- Narcissus willkommii – jonquilla daffodil
- Narcissus 'Winter Waltz'
- Narcissus 'Wisley'
- Narcissus 'Xit'
- Narcissus 'Yazz'
- Narcissus 'Yellow Cheerfulness' – double daffodil
- Narcissus 'Yellow Parrot'
- Narcissus 'Yellow Sailboat'
- Nectaroscordum siculum subsp. bulgaricum
- Neillia tanakae – Japanese stephanandra
- Neillia uekii – Korean neillia
- Nelumbo nucifera – sacred lotus
- Neolepisorus fortunei – Fortune's ribbon fern
- Nepeta – catmint
- Nepeta 'Blue'
- Nepeta 'Chartreuse on the Loose' – catmint
- Nepeta 'Early Bird' – catmint
- Nepeta ×faassenii 'Novanepjun' – Junior Walker catmint
- Nepeta 'Joanna Reed' – catmint
- Nepeta 'Psfike' – Little Trudy catmint
- Nepeta 'Six Hills Giant' – catmint
- Nepeta subsessilis 'Blue Panther'
- Nepeta subsessilis 'Pink Panther'
- Nepeta – SylvesterBlue catmint
- Nerium oleander 'Hardy Pink' – hardy oleander
- Nerium oleander 'Mathilde Ferrier' – hardy oleander
- Neviusia alabamensis – Alabama snow-wreath
- Nicotiana longiflora
- Nicotiana mutabilis – flowering tobacco
- Nipponanthemum nipponicum – Nippon daisy
- Nolina – bear-grass
- Nolina durangensis – beargrass
- Nolina erumpens – foothill bear-grass
- Nolina lindheimeriana – devil's shoestring
- Nolina longifolia – Mexican grass tree
- Nolina nelsonii – Nelson's blue bear-grass
- Nolina parryi – Parry's bear-grass
- Notholirion thomsonianum – Thomson's notholirion
- Notholithocarpus densiflorus var. echinoides – bush tanoak
- Nothoscordum montevidense
- Nothoscordum sellowianum – false yellow crocus
- Nothotsuga longibracteata – Bristlecone hemlock
- Notocactus apricus – sun cup
- Notocactus floricomus – Tom Thumb cactus
- Notocactus mammulosus – Tom Thumb cactus
- Notocactus schlosseri
- Notocactus submammulosus – sub-nippled hardy notocactus
- Nymphaea 'Rosenymphe'
- Nyssa aff. schweliensis
- Nyssa sylvatica 'JFS-red' – Firestarter tupelo
- Nyssa sylvatica 'Miss Scarlet' – black gum
- Nyssa sylvatica (weeping)
- Nyssa ursina – bear tupelo
- Ocimum 'African Blue' – hybrid basil
- Ocimum ×citriodorum 'Pesto Perpetuo'
- Odontonema tubaeforme – firespike
- Oenothera acaulis
- Oenothera argillicola – shale barren evening primrose
- Oenothera capillifolia subsp. berlandieri 'Butter Cream' – sundrop
- Oenothera capillifolia (Dripping Springs) – sundrops
- Oenothera fruticosa 'Fireworks' – evening primrose
- Oenothera macrocarpa 'Evening Sun'
- Oenothera serrulata 'Prairie Lode' – sundrops
- Onosma
- Onychium japonicum 'Sichuan Lace' – carrot fern
- Ophiopogon – mondo grass
- Ophiopogon bodinieri – mondo grass
- Ophiopogon 'Golden Zebra'
- Ophiopogon 'Hakuryukou-no-kawhrhi' – variegated mondo grass
- Ophiopogon 'Hosoba Kokuryu' – mondo grass
- Ophiopogon intermedius – Himalayan lilyturf
- Ophiopogon japonicus – mondo grass
- Ophiopogon japonicus 'Aritaki'
- Ophiopogon japonicus 'Gyoku Ryu' – dwarf mondo grass
- Ophiopogon japonicus 'Monkeyshine' – mondo grass
- Ophiopogon japonicus 'Nana Variegata' – dwarf mondo grass
- Ophiopogon japonicus 'Tuff Tuft Lavender' – mondo grass
- Ophiopogon (large fruit)
- Ophiopogon malcolmsonii – mondo grass
- Ophiopogon planiscapus – mondo grass
- Ophiopogon planiscapus 'Kokuryu' – black mondo grass
- Ophiopogon umbraticola – Chinese mondo grass
- Ophiopogon umbraticola 'Sparkler' – mondo grass
- Opuntia – prickly-pear
- Opuntia aurea – golden prickly pear
- Opuntia aurea 'Al Parker' – Walk in Beauty golden prickly pear
- Opuntia aurea 'Apricot Glory' – Walk in Beauty golden prickly pear
- Opuntia aurea 'Chocolate Princess' – Walk in Beauty golden prickly pear
- Opuntia aurea 'Colorado Sunset' – Walk in Beauty golden prickly pear
- Opuntia aurea 'Coombe's Winter Glow' – golden prickly pear
- Opuntia aurea 'Hawaiian Punch' – Walk in Beauty golden prickly pear
- Opuntia aurea 'Ruffle Apricot' – Walk in Beauty golden prickly pear
- Opuntia cacanapa 'Ellisiana' – spineless prickly-pear
- Opuntia clavata – club cholla
- Opuntia fragilis
- Opuntia fragilis 'Potato'
- Opuntia fragilis 'Tiny Michigan Form'
- Opuntia gilvescens 'Oklahoma Pancake' – western prickly pear cactus
- Opuntia humifusa – prickly pear cactus
- Opuntia humifusa 'Sunshine' – eastern prickly pear cactus
- Opuntia phaeacantha 'Mesa Sky' – tulip prickly pear cactus
- Opuntia phaeacantha 'Plum'
- Opuntia polyacantha f. rosaeflora – Plains prickly-pear
- Opuntia polycantha 'Peter Pan'
- Opuntia pusilla – beach prickly-pear cactus
- Opuntia woodsii – prickly pear cactus
- Orbexilum pedunculatum
- Orbexilum psoralioides – spider flower
- ×Oredenia 'Fusion of Fire'
- Oreocharis pankaiyuae – golden tremacron
- Oreocharis speciosa
- Origanum acutidens
- Origanum 'Amethyst Falls' – ornamental oregano
- Origanum 'Gilt Trip' – oregano
- Origanum laevigatum 'Lizzie' – oregano
- Origanum laevigatum 'Pilgrim' – oregano
- Origanum vulgare 'Aureum' – gold leafed oregano
- Orixa japonica – Japanese orixa
- Orixa japonica 'Pearl Frost' – variegated Japanese orixa
- Ornithogalum balansae
- Ornithogalum dubium
- Ornithogalum magnum – star of Bethlehem
- Ornithogalum viridiflorum
- Orostachys fimbriata
- Orostachys furusei – dunce cap
- Orostachys malacophylla
- Orostachys malacophylla var. aggregata
- Osmanthus
- Osmanthus armatus – devil wood
- Osmanthus armatus 'Jim Porter' – devil wood
- Osmanthus armatus 'Zipline' – devil wood
- Osmanthus ×fortunei – Fortune's osmanthus
- Osmanthus ×fortunei 'Carl Wheeler' – Fortune's osmanthus
- Osmanthus ×fortunei (entire leaf form) – Fortune's osmanthus
- Osmanthus ×fortunei 'Mokusui' – Fortune's osmanthus
- Osmanthus ×fortunei 'Ninth and Polk' – Fortune's osmanthus
- Osmanthus ×fortunei 'UNC' – Fortune's osmanthus
- Osmanthus fragrans f. aurantiacus – orange sweet olive
- Osmanthus fragrans f. aurantiacus 'Apricot Echo' – sweet olive
- Osmanthus fragrans var. aurantiacus 'Beni Kin Mokusei' – red-flower sweet olive
- Osmanthus fragrans f. aurantiacus 'Butter Yellow' – yellow sweet olive
- Osmanthus fragrans f. aurantiacus 'Conger Yellow' – yellow sweet olive
- Osmanthus fragrans f. aurantiacus 'Live Oak Gold' – golden sweet olive
- Osmanthus fragrans f. aurantiacus 'Orange Supreme' – orange sweet olive
- Osmanthus fragrans 'Da Hong Zhu Sha Gui' – sweet olive
- Osmanthus fragrans (female) – sweet olive
- Osmanthus fragrans 'Gold Splash' – sweet olive
- Osmanthus fragrans 'Qiannan Guifei' – sweet olive
- Osmanthus fragrans 'Rixiang Gui' – sweet olive
- Osmanthus fragrans var. thunbergii – Japanese sweet olive
- Osmanthus fragrans 'Tianxiang Taige' – sweet olive
- Osmanthus fragrans 'Yinbi Shuanghui' – sweet olive
- Osmanthus fragrans 'Zao Hong Don Gui' – sweet olive
- Osmanthus heterophyllus 'Akebono' – holly olive
- Osmanthus heterophyllus (ex. 'Sasaba') – holly olive
- Osmanthus heterophyllus 'Fastigiata' – holly olive
- Osmanthus heterophyllus 'Goshiki' – holly olive
- Osmanthus heterophyllus 'Hamakita Shirofu' – holly olive
- Osmanthus heterophyllus 'Hariyama' – holly olive
- Osmanthus heterophyllus 'Head-Lee Fastigiate' – holly olive
- Osmanthus heterophyllus 'Kaori Hime' – Chinese false holly
- Osmanthus heterophyllus 'Kembu' – holly olive
- Osmanthus heterophyllus (New 'Rotundifolius') – holly olive
- Osmanthus heterophyllus (No. 2) – holly olive
- Osmanthus heterophyllus 'Ogon' – holly olive
- Osmanthus heterophyllus 'Purpureus' – holly olive
- Osmanthus heterophyllus 'Sasaba' – holly olive
- Osmanthus heterophyllus 'Shien' – Party Lights holly olive
- Osmanthus cf. serrulatus – serrate leaf sweet olive
- Osmunda japonica – Asian royal fern
- Ostrya japonica – Japanese hophornbeam
- Oxalis adenophylla
- Oxalis bowiei – Cape shamrock
- Oxalis crassipes 'Alba'
- Oxalis crassipes 'Cherry Spritzer'
- Oxalis debilis var. corymbosa 'Aureoreticulata' – pink woodsorrel
- Oxalis lasiandra
- Oxalis tetraphylla – iron cross lucky clover
- Oxalis tetraphylla 'Iron Cross'
- Oxalis triangularis – false shamrock
- Oxalis triangularis 'Ebony' – ALLURE false shamrock
- Oxalis triangularis 'Fanny' – Wood Sorrel
- Oxalis triangularis 'Irish Mist' – false shamrock
- Oxalis triangularis (Irish Mist x Atropurpurea) – false shamrock
- Oxalis triangularis 'Mijke' – purple shamrock
- Oxalis triangularis subsp. papilionacea – purple false shamrock
- Oxalis versicolor
- Oxypetalum coeruleum – tweedia
- Ozothamnus 'Sussex Silver'
- Pachysandra axillaris subsp. stylosa – Chinese pachysandra
- Pachysandra procumbens – Allegheny spurge
- Pachysandra terminalis 'Cutleaf' – cutleaf Japanese pachysandra
- Pachysandra terminalis 'Green Sheen' – Japanese pachysandra
- Paeonia 'Amalia Olson' – garden peony
- Paeonia 'Angel Cheeks' – garden peony
- Paeonia 'Armani' – garden peony
- Paeonia 'Bartzella' – Itoh hybrid peony
- Paeonia 'Bernice Carr' – garden peony
- Paeonia 'Big Ben' – garden peony
- Paeonia aff. caucasica – species peony
- Paeonia 'Cora Louise' – Itoh peony
- Paeonia 'Coral Charm' – garden peony
- Paeonia 'Coral 'n Gold' – garden peony
- Paeonia 'Coral Sunset' – garden peony
- Paeonia 'Cytherea' – garden peony
- Paeonia 'Do Tell' – garden peony
- Paeonia 'Early Scout' – garden peony
- Paeonia 'Eliza Lundy' – garden peony
- Paeonia 'Fairfield' – garden peony
- Paeonia 'Garden Lace' – garden peony
- Paeonia 'Garden Treasure' – Itoh peony
- Paeonia 'Hillary' – Itoh peony
- Paeonia 'Honor' – garden peony
- Paeonia 'Krinkled White' – garden peony
- Paeonia lactiflora – garden peony
- Paeonia lactiflora 'Festiva Maxima' – garden peony
- Paeonia lactiflora 'Karl Rosenfield' – garden peony
- Paeonia 'Miss America' – garden peony
- Paeonia 'Nice Gal' – garden peony
- Paeonia ostii 'Feng Dan Bai' – Phoenix White Osti's tree peony
- Paeonia 'Paul M. Wild' – garden peony
- Paeonia 'Pecher' – garden peony
- Paeonia peregrina – species peony
- Paeonia 'Pink Double Dandy' – Keiko Itoh peony
- Paeonia 'Pink Hawaiian Coral' – garden peony
- Paeonia 'Prairie Charm' – Itoh peony
- Paeonia 'Requiem' – garden peony
- Paeonia 'Rozella' – garden peony
- Paeonia 'Scarlett O'Hara' – garden peony
- Paeonia 'Scrumdidleyumptious' – Itoh peony
- Paeonia 'Seashell' – garden peony
- Paeonia 'Smith Opus 2' – Takara garden peony
- Paeonia 'Stellar Charm' – garden peony
- Paeonia suffruticosa 'Sahohine' – tree peony
- Paeonia suffruticosa 'Shima-nishiki' – bicolor tree peony
- Paeonia suffruticosa 'Shimadaijin' – tree peony
- Paeonia 'The Fawn' – garden peony
- Paeonia 'Topeka Garnet' – garden peony
- Paeonia 'Trafford W. Bigger' – garden peony
- Paeonia 'White Frost' – garden peony
- Paesia scaberula – scented fern
- Panicum amarum 'Dewey Blue' – bitter panicgrass
- Panicum 'Cape Breeze' – dwarf switch grass
- Panicum 'Rr1' – Ruby Ribbons panic grass
- Panicum virgatum – common switch grass
- Panicum virgatum 'Cheyenne Sky' – Prairie Winds red switch grass
- Panicum virgatum 'Dallas Blues' – common switch grass
- Panicum virgatum 'Heavy Metal' – common switch grass
- Panicum virgatum 'Northwind' – common switch grass
- Panicum virgatum (PN16360)
- Panicum virgatum 'Shenandoah' – common switch grass
- Panicum virgatum 'Summer Sunrise'
- Panicum virgatum 'Thundercloud' – tall switchgrass
- Paradisea liliastrum – St. Bruno's lily
- ×Pardancanda (Dazzler select)
- Paris
- Paris chinensis
- Parrotia persica 'Burgundy' – Persian ironwood
- Parrotia persica 'Chrishaven1' – Golden Bell Tower ironwood
- Parrotia persica 'Pendula' – weeping Persian ironwood
- Parrotia persica 'Persian Lace' – variegated Persian ironwood
- Parrotia subaequalis – Chinese ironwood
- Parrotiopsis jacquemontiana – false ironwood
- Parthenocissus henryana
- Parthenocissus tricuspidata – Boston ivy
- Parthenocissus tricuspidata 'Fenway Park' – golden Boston ivy
- Parthenocissus tricuspidata 'Ginza Light' – variegated Boston ivy
- Passiflora 'Elizabeth' – passion flower
- Passiflora incarnata (white form) – white maypop passion flower
- Passiflora 'Inspiration' – purple passion flower
- Passiflora 'Monika Fischer' – passion flower
- Patrinia
- Patrinia monandra
- Patrinia scabiosifolia – golden lace
- Pavonia brasiliensis
- Pelargonium
- Pelargonium 'Kleip13342'
- Pelargonium ranunculophyllum
- Pelargonium sidoides – silver leaf geranium
- Pelargonium transvaalense 'African Princess' – hardy pelargonium
- Peltandra virginica – arrow arum
- Pennisetum alopecuroides 'Cassian' – fountain grass
- Pennisetum alopecuroides 'Etouffee'
- Pennisetum alopecuroides 'Lemon Squeeze'
- Pennisetum orientale 'Karley Rose' – fountain grass
- Pennisetum orientale 'Tall Tails' – giant fountain grass
- Pennisetum purpureum – red elephant grass
- Pennisetum purpureum 'Prince' – purple Napier grass
- Penstemon – beardtongue
- Penstemon barbatus 'Elfin Pink' – golden-beard penstemon
- Penstemon barbatus 'Novapenrub' – Rock Candy Ruby golden-beard penstemon
- Penstemon 'Dark Towers' – beard tongue
- Penstemon aff. digitalis – beardtongue
- Penstemon digitalis 'Blackbeard' – beardtongue
- Penstemon 'Flock of Flamingos'
- Penstemon hirsutus – hairy beardtongue
- Penstemon laevigatus
- Penstemon 'Onyx and Pearls' – beardtongue
- Penstemon 'Parade of Parrots' – penstemon
- Penstemon tenuis – sharpsepal beardtongue
- Perovskia atriplicifolia 'CrazyBlue' – Russian sage
- Perovskia atriplicifolia 'Lisslitt' – Lacey Blue Russian sage
- Perovskia 'Novaperlac'
- Persea liebmannii – Mexican redbay
- Persicaria amplexicaulis 'Fat Domino'
- Persicaria amplexicaulis 'Firetail' – mountain fleece flower
- Persicaria amplexicaulis 'Golden Arrow' – mountain fleece
- Persicaria microcephala 'Red Dragon' – knotweed
- Persicaria virginiana 'Painter's Palette' – variegated Virginia knotweed
- Petrosedum rupestre – Jenny's stonecrop
- Petrosedum rupestre 'Nonal' – Sunsplash Jenny's stonecrop
- Petrosedum rupestre (red leaf form) – Jenny's stonecrop
- Petunia exserta
- Peucedanum japonicum 'Hakikomi Fu'
- Phedimus 'Czar's Gold' – Mongolian stonecrop
- Phedimus selskianus – Amur stonecrop
- Phedimus selskianus 'Goldilocks' – Amur stonecrop
- Phedimus sichotensis
- Phedimus spurious 'Voodoo' – Caucasian stonecrop
- Phemeranthus calycinus – cherry sunbright
- Philadelphus – mock-orange
- Philadelphus coronarius 'Aureus' – mock-orange
- Philadelphus 'Innocence' – mock-orange
- Philadelphus 'NC-Phi13' – mock-orange
- Philadelphus 'Polar Star' – mock-orange
- Philadelphus satsumi – mock-orange
- Philadelphus 'Silberregen' – silver showers mock-orange
- Philadelphus 'Snow Velvet' – mock-orange
- Philadelphus 'Snowwhite Fantasy' – Snow White Sensation mock-orange
- Philadelphus 'Starbright' – mock-orange
- Philadelphus tomentosus – fuzzy mock-orange
- Phlomis – Jerusalem sage
- Phlomis ×cytherea
- Phlomis fruticosa – Jerusalem sage
- Phlomis grandiflora – Jerusalem sage
- Phlomis herba-venti – Iranian Jerusalem sage
- Phlomis 'Lloyd's Variety' – Lloyd's false sage
- Phlomis lycia
- Phlomis tuberosa – tuberous Jerusalem sage
- Phlomoides maximowiczii – torchwort
- Phlomoides pratensis
- Phlox 'Amethyst Pearl' – garden phlox
- Phlox 'Bedazzled Lavender' – garden phlox
- Phlox carolina 'Kim' – Carolina phlox
- Phlox divaricata subsp. laphamii 'Chattahoochee' – woodland phlox
- Phlox 'KazI14830' – Gisele White garden phlox
- Phlox – Multi Confetti Spring garden phlox
- Phlox nivalis 'Camla' – trailing phlox
- Phlox nivalis (near white) – trailing phlox
- Phlox 'Opening Act White' – garden phlox
- Phlox paniculata 'Backlight' – Luminary garden phlox
- Phlox paniculata 'David' – garden phlox
- Phlox paniculata 'David's Lavender' – garden phlox
- Phlox paniculata 'Delta Snow' – tall phlox
- Phlox paniculata 'Glamour Girl' – garden phlox
- Phlox paniculata 'John Fanick' – tall phlox
- Phlox paniculata 'Red Riding Hood' – tall phlox
- Phlox paniculata 'Shockwave' – garden phlox
- Phlox pilosa – downy phlox
- Phlox pulchra (Cahaba River)
- Phlox stolonifera 'Weesie Smith' – creeping phlox
- Phlox subulata 'Emerald Blue' – moss phlox
- Phlox subulata 'Herbert'
- Phlox subulata 'Snowflake' – moss phlox
- Phlox subulata 'Spring Dark Pink'
- Phlox 'Wanda' – garden phlox
- Phormium colensoi – mountain flax
- Photinia davidiana 'Palette' – Chinese photinia
- Photinia ×fraseri 'Cassini' – Pink Marble red tip photinia
- Photinia integrifolia (G11130)
- Photinia niitakayamensis – Yushan pear
- Photinia serratifolia 'Green Giant' – Chinese photinia
- Photinia villosa 'Village Shade' – downy photinia
- Phygelius 'TNPHYCRO' – Colorburst Rose cape fuchsia
- Phyllocladus cf. alpinus – mountain toatoa
- Phyllostachys nigra – black bamboo
- Physocarpus capitatus – western ninebark
- Physocarpus malvaceus – mallow ninebark
- Physocarpus opulifolius 'Donna May' – Little Devil dwarf purple-leaf ninebark
- Physocarpus opulifolius 'Nanus' – dwarf ninebark
- Physocarpus opulifolius 'ZLEYel2' – Raspberry Lemonade dwarf ninebark
- Physostegia correllii
- Physostegia virginiana 'Vivid' – obedient plant
- Picea abies 'Dandylion' – gold weeping spruce
- Picea abies 'Dan's Dwarf' – Norway spruce
- Picea abies 'Jessy' – Norway spruce
- Picea abies 'Maxwellii' – dwarf Norway spruce
- Picea abies 'Mikulasovice' – Norway spruce
- Picea abies 'Perry's Gold' – gold-tipped Norway spruce
- Picea alcoquiana 'Prostrata' – prostrate Alcock spruce
- Picea breweriana 'Wüstemeyer' – Brewer spruce
- Picea engelmannii 'Snake' – Engelmann spruce
- Picea glauca 'Ducharme' – dwarf white spruce
- Picea glauca 'Westervelt' – Skinny Blue Genes Black Hills spruce
- Picea likiangensis var. montigena – northern Likiang spruce
- Picea martinezii – Nuevo León spruce
- Picea morrisonicola – Taiwan spruce
- Picea omorika 'Bruns' – Serbian Spruce
- Picea omorika 'Kuck's Weeping' – weeping Serbian spruce
- Picea omorika 'Osmaston No. 1' – dwarf Serbian spruce
- Picea orientalis – Caucasian spruce
- Picea orientalis 'Aureospicata' – gold-tip Caucasian spruce
- Picea orientalis 'Nana' – dwarf Caucasian spruce
- Picea orientalis 'Skylands' – Caucasian spruce
- Picea pungens 'Gebelle's' – Golden Spring Colorado spruce
- Picea pungens 'Hoopsii' – Colorado spruce
- Picea pungens 'Hugo's Weeping' – Colorado spruce
- Picea pungens 'Maigold' – Colorado spruce
- Picea pungens 'Thuem' – Colorado spruce
- Picea rubens 'Hb'
- Picea torano – tiger-tail spruce
- Pieris japonica 'Compacta' – Japanese andromeda
- Pieris japonica 'Conrabideau' – Angel Falls Japanese andromeda
- Pieris japonica 'Farrowpjrf' – Interstella Japanese andromeda
- Pieris japonica 'Pygmaea' – pygmy Japanese andromeda
- Pieris taiwanensis – Formosan andromeda
- Pileostegia viburnoides var. viburnoides – evergreen climbing false hydrangea
- Pinellia peltata
- Pinus aristata 'Lemon Frost' – gold bristlecone pine
- Pinus armandii var. mastersiana – Masters Pine
- Pinus bungeana – lacebark pine
- Pinus bungeana 'Silver Ghost' – lacebark pine
- Pinus cembra 'Algonquin Pillar' – Swiss stone pine
- Pinus densiflora 'Burke's Red Variegated' – variegated Japanese red pine
- Pinus densiflora 'Cesarini's Variegated' – Japanese red pine
- Pinus densiflora 'Green Diamond' – Japanese red pine
- Pinus densiflora 'Low Glow' – dwarf Japanese red pine
- Pinus densiflora 'Vibrant' – dwarf Japanese red pine
- Pinus 'Domingo' – white pine
- Pinus engelmannii – Apache pine
- Pinus heldreichii 'Mint Truffle' – Bosnian Pine
- Pinus koraiensis 'Dragon Eye' – variegated Korean pine
- Pinus koraiensis 'Jack Corbit' – Korean pine
- Pinus kwangtungensis – Guangdong white pine
- Pinus leucodermis 'Emerald Arrow' – Bosnian pine
- Pinus leucodermis 'Irish Bell' – Bosnian pine
- Pinus morrisonicola – Taiwan white pine
- Pinus mugo 'Carsten's Wintergold' – mugo pine
- Pinus mugo 'Piggelmee' – mugo pine
- Pinus mugo 'Spilled Milk' – mugo pine
- Pinus nigra 'Arnold Sentinel' – fastigiate Austrian black pine
- Pinus parviflora 'Aoi' – Japanese white pine
- Pinus parviflora 'Brevifolia' – Japanese white pine
- Pinus parviflora 'Gimborn's Ideal' – Japanese white pine
- Pinus parviflora 'Kin-po' – Japanese white pine
- Pinus parviflora 'Negishi' – Japanese white pine
- Pinus strobiformis 'Foxtail' – compact southwestern white pine
- Pinus strobus 'Diggy' – eastern white pine
- Pinus strobus 'Golden Showers' – eastern white pine
- Pinus strobus 'Pendula' – eastern white pine
- Pinus sylvestris 'Green Penguin' – scotch pine
- Pinus sylvestris 'KBN Gold' – Scots pine
- Pinus sylvestris 'Moseri' – dwarf winter gold Scots pine
- Pinus tabuliformis 'Twisted Sister' – Chinese red pine
- Pinus taeda – loblolly pine
- Pinus taeda 'Little Albert' – dwarf loblolly pine
- Pinus taeda NCSU Dwarf Group – dwarf loblolly pine
- Pinus thunbergii var. corticosa – cork-bark Japanese black pine
- Pinus thunbergii 'Emery's Dwarf' – Japanese black pine
- Pinus thunbergii 'Kotobuki' – dwarf Japanese black pine
- Pinus thunbergii 'War Bonnet' – variegated Japanese black pine
- Pinus virginiana 'Wate's Golden' – wintergold Virginia pine
- Pinus wallichiana – Himalayan pine
- Piper auritum – root beer plant
- Piper kadsura 'Pied Piper' – Japanese pepper
- Pittosporum brevicalyx 'Golden Temple'
- Pittosporum heterophyllum – Chinese pittosporum
- Pittosporum heterophyllum 'Variegatum' – variegated pittosporum
- Pittosporum heterophyllum 'Winter Frost' – Chinese pittosporum
- Pittosporum illicioides – pittosporum
- Pittosporum illicioides 'Strappy' – narrow-leaved pittosporum
- Pittosporum parvilimbum
- Pittosporum 'Sappy' – pittosporum
- Pittosporum tenuifolium – kohuhu
- Pittosporum tenuifolium 'Tandara Gold' – kohuhu
- Pittosporum tobira 'Kansai Sunburst' – Japanese pittosporum
- Pittosporum tobira 'Spring Bouquet' – Japanese pittosporum
- Pittosporum tobira 'Tall 'N Tough' – Japanese pittosporum
- Pittosporum aff. truncatum – truncated pittosporum
- Pityopsis graminifolia – narrowleaf silk-grass
- Planera aquatica – water elm
- Planera aquatica 'Falling Waters' – weeping water elm
- Platanus lindeniana – Linden's plane tree
- Platanus rzedowskii (2013-433)
- Platycladus orientalis – oriental arborvitae
- Platycladus orientalis 'Coral Queen' – oriental arborvitae
- Platycladus orientalis 'Franky Boy' – oriental arborvitae
- Platycladus orientalis 'Madurodam' – oriental arborvitae
- Platycladus orientalis 'Morgan' – oriental arborvitae
- Platycladus orientalis 'Southport' – oriental arborvitae
- Platycladus orientalis 'Van Hoey Smith' – oriental arborvitae
- Platycodon grandiflorus 'Double Blue' – balloon flower
- Platycodon grandiflorus 'Fuji White' – white balloon flower
- Platycrater arguta – tea of heaven
- Platycrater arguta 'Kaeda' – tea of heaven
- Platycrater (pink form)
- Pleione Alishan gx – hardy orchid
- Pleione Irazu gx – Tibetan orchid
- Pleione Vesuvius gx – Tibetan orchid
- Pleopeltis bombycina 'Morro dos Conventos'
- Podocarpus acutifolius – needle-leaved totara
- Podocarpus chinensis – Chinese podocarpus
- Podocarpus 'Flame' – Buddhist pine
- Podocarpus forrestii
- Podocarpus lawrencei 'Purple King' – mountain plum-pine
- Podocarpus macrophyllus – Buddhist pine
- Podocarpus macrophyllus 'Akame' – Buddhist pine
- Podocarpus macrophyllus 'Aureus' – Buddhist pine
- Podocarpus macrophyllus (dwarf) – Buddhist pine
- Podocarpus macrophyllus (ex 'Okina') – Buddhist pine
- Podocarpus macrophyllus (hardy form) – Buddhist pine
- Podocarpus macrophyllus var. maki 'Argenteus' – Buddhist pine
- Podocarpus macrophyllus var. maki 'Edgefield' – Buddhist pine
- Podocarpus macrophyllus var. maki (ex. 'Edgefield') – Buddhist pine
- Podocarpus macrophyllus var. maki 'Kinme' – Buddhist pine
- Podocarpus macrophyllus 'Miu' – Roman Candle Buddhist pine
- Podocarpus macrophyllus 'Okina' – Buddhist pine
- Podocarpus macrophyllus 'Pringle's Dwarf' – Buddhist pine
- Podocarpus macrophyllus 'Sunshine Spire' – Buddhist pine
- Podocarpus macrophyllus 'Uptight' – Buddhist pine
- Podocarpus macrophyllus (variegated) – Buddhist pine
- Podocarpus neriifolius – brown pine
- Podocarpus 'Orangeade' – plum pine
- Podocarpus salignus – willow-leaf podocarp
- Podocarpus totara 'Aureus' – golden totara
- Podocarpus totara 'Matapouri Blue' – totara
- Podophyllum hexandrum – Himalayan mayapple
- Podophyllum peltatum – mayapple
- Podophyllum peltatum 'Wagon Wheel' – mayapple
- Podophyllum pleianthum – Chinese mayapple
- Podophyllum 'Spotty Dotty' – hybrid mayapple
- Polianthes ×bundrantii – Mexican firecracker
- Polianthes 'Chirp'
- Polianthes 'Sunset'
- Polianthes tuberosa 'Sensation' – tuberose
- Polianthes tuberosa 'Swarna Rekah' – tuberose
- Polianthes tuberosa 'Yellow Baby' – tuberose
- Poliomintha bustamanta – Mexican oregano
- Poliothyrsis sinensis – Chinese pearlbloom
- Polygonatum – Solomon's seal
- Polygonatum arisanense var. arisanense – Solomon's seal
- Polygonatum arisanense var. formosanum – Solomon's seal
- Polygonatum biflorum – smooth Solomon's seal
- Polygonatum biflorum 'Arkansas Giant' – Solomon's seal
- Polygonatum biflorum 'Prince Charming' – dwarf smooth Solomon's seal
- Polygonatum bulbosum – Solomon's seal
- Polygonatum cyrtonema – Solomon's seal
- Polygonatum falcatum 'Nippon Sunbeam' – Solomon's seal
- Polygonatum graminifolium – grass-leaved Solomon's seal
- Polygonatum hirtum – hairy Solomon's seal
- Polygonatum hirtum (dwarf form) – dwarf glossy leaf Solomon seal
- Polygonatum involucratum – Solomon's seal
- Polygonatum kingianum – Solomon's seal
- Polygonatum kingianum 'Fusion'
- Polygonatum kingianum (orange flowered form) – Solomon's seal
- Polygonatum latifolium – Solomon's seal
- Polygonatum latifolium 'Heronswood' – Solomon's seal
- Polygonatum macranthum 'Tiger Stripes' – Solomon's seal
- Polygonatum multiflorum – European Solomon's seal
- Polygonatum odoratum – Solomon's seal
- Polygonatum odoratum 'Akaijaku' – Solomon's seal
- Polygonatum odoratum 'Byakko' – Solomon's seal
- Polygonatum odoratum 'Double Stuff' – Soloman's seal
- Polygonatum odoratum 'Fireworks' – Solomon's seal
- Polygonatum odoratum 'Goldilocks' – Solomon's seal
- Polygonatum odoratum 'Ki Chou' – Solomon's seal
- Polygonatum odoratum var. maximowiczii – Solomon's seal
- Polygonatum odoratum var. pluriflorum 'Jinguji' – Solomon's seal
- Polygonatum odoratum var. pluriflorum 'Variegatum' – variegated Solomon's seal
- Polygonatum prattii – Chinese Solomon's seal
- Polygonatum sibiricum (tetraploid) – Solomon's seal
- Polygonatum (streaky foliage)
- Polygonatum uncinatum – Solomon's seal
- Polygonatum urceolatum – Solomon's seal
- Polygonatum vietnamicum – Solomon's seal
- Polygonatum yunnanense – Solomon's seal
- Polygonatum zhejiangensis – giant Solomon's seal
- Polypodioides formosana
- Polypodium guttatum
- Polyspora – fried egg tree
- Polyspora chrysandra – false camellia
- Polystichum acrostichoides – Christmas fern
- Polystichum makinoi – Makino's shield fern
- Polystichum polyblepharum – tassel fern
- Polystichum tsus-simense – Korean rock fern
- Polystichum tsus-simense var. mayebarae 'Tao Yuan Giant' – tassel fern
- Populus monticola – white bark cottonwood
- Potentilla argentea – silvery cinquefoil
- Potentilla neumanniana
- Primula 'Dale Henderson' – garden primrose
- Primula japonica – Japanese primrose
- Primula kisoana var. alba
- Primula palinuri – bear's ear
- Primula sieboldii 'Drag Queen'
- Primula sieboldii 'Fuji Snow'
- Primula sieboldii 'Loie Benedict'
- Primulina liguliformis
- Proboscidea louisianica
- Pronephrium penangianum – Chinese peng fern
- Prospero autumnale
- Prunella laciniata – cutleaf selfheal
- Prunus ×blireana – Blireana plum
- Prunus campanulata – Taiwan cherry
- Prunus cerasifera 'Cripoizam' – Crimson Pointe fastigiate purple-leaf plum
- Prunus 'First Lady' – hybrid flowering cherry
- Prunus incisa – Fuji cherry
- Prunus incisa 'FPMSPL' – Lemon Splash weeping Fuji cherry
- Prunus incisa 'Rinpo' – Zuzu dwarf Fuji cherry
- Prunus incisa 'Shikizaki' – weeping Fuji cherry
- Prunus jacquemontii – Afghan bush cherry
- Prunus 'JFS-KW 14' – First Blush flowering cherry
- Prunus laurocerasus 'Chestnut Hill' – dwarf cherry laurel
- Prunus laurocerasus 'Majestic Jade' – cherry laurel
- Prunus mexicana – Mexican plum
- Prunus mume – flowering apricot
- Prunus mume 'Big Joe' – white flowering apricot
- Prunus mume 'Bonita' – pink flowering apricot
- Prunus mume 'Bridal Veil' – weeping flowering apricot
- Prunus mume 'Nicholas' – flowering apricot
- Prunus mume 'Okitsu-akabana' – flowering apricot
- Prunus mume 'Omoi-no-mama' – flowering apricot
- Prunus mume 'Peggy Clarke' – pink flowering apricot
- Prunus mume 'Rose Bud' – pink flowering apricot
- Prunus mume 'Tojibai' – white flowering apricot
- Prunus mume 'Yuh-Hwa' – flowering apricot
- Prunus (NA 63480) – U.S. National Arboretum hybrid flowering cherry
- Prunus persica 'Bonfire' – purple-leaf peach
- Prunus persica 'Corinthian Pink' – columnar flowering peach
- Prunus persica 'NC Peach-6' – Ruby Ruffle purple-leaf dwarf peach
- Prunus persica 'NCSU Dwarf Double Red' – flowering peach
- Prunus 'Purple Pride' – purple leaf plum
- Prunus sargentii 'JFS KW21PS' – Pink Myst Sargent's cherry
- Prunus takesimensis – Ullung-do cherry
- Prunus 'Ukon' – green-flowering cherry
- Prunus 'Umineko' – Japanese flowering cherry
- Prunus virginiana 'Canada Red' – chokecherry
- Pseudocydonia sinensis – Chinese quince
- Pseudolarix amabilis – golden larch
- Pseudolysimachion kiusianum – speedwell
- Pseudomuscari coeleste
- Pseudotsuga sinensis var. wilsoniana – Taiwan Douglas-fir
- Ptelea trifoliata – hop tree
- Ptelea trifoliata subsp. polyadenia – hop tree
- Pteris cretica var. laeta 'Wu Wu' – ribbon fern
- Pteris multifida 'Jade Waterfall' – ribbon fern
- Pterocarya rhoifolia – Japanese wingnut
- Pterocarya tonkinensis – Tonkin wingnut
- Pteroceltis tatarinowii – blue sandalwood
- Pterostyrax corymbosus 'Silver Shadow' – little epaulettetree
- Pueraria montana var. lobata 'Sherman's Ghost' – variegated kudzu
- Pulmonaria 'Margery Fish' – lungwort
- Pulmonaria 'Silver Bouquet' – lungwort
- Pulmonaria 'Silver Scimitar'
- Pulmonaria 'Twinkle Toes' – lungwort
- Pulsatilla cernua – pasque-flower
- Pulsatilla dahurica – pasque flower
- Pulsatilla georgica – pasque flower
- Pulsatilla halleri – Haller's pasque-flower
- Pulsatilla halleri subsp. slavica
- Pulsatilla halleri subsp. styriaca – Steiermark pasque-flower
- Pulsatilla montana subsp. jankae – mountain anemone
- Pulsatilla patens – pasque flower
- Pulsatilla pratensis subsp. nigricans – pasqueflower
- Pulsatilla vulgaris – pasque flower
- Pulsatilla vulgaris subsp. grandis
- Pulsatilla vulgaris 'Rosen Glocke'
- Pulsatilla vulgaris 'Rote Glocke' – Red Bells pasque flower
- Punica granatum 'Agat' – edible pomegranate
- Punica granatum 'Blaze' – edible pomegranate
- Punica granatum 'Dotch Legrelley' – pomegranate
- Punica granatum (double red-white) – pomegranate
- Punica granatum 'Gosai-ryu' – pomegranate
- Punica granatum (large, double white) – pomegranate
- Punica granatum 'Loffani' – pomegranate
- Punica granatum 'Phoenicia' – pomegranate
- Punica granatum 'Salavatski' – pomegranate
- Punica granatum 'State Fair' – dwarf pomegranate
- Punica granatum 'Surh-anor' – edible pomegranate
- Punica granatum (variegated) – variegated pomegranate
- Puschkinia scilloides 'Alba'
- Puschkinia scilloides var. libanotica – puschkinia
- Pycnanthemum flexuosum – Appalachian mountain mint
- Pycnanthemum incanum – mountain mint
- Pycnanthemum loomisii – Loomis's mountain mint
- Pycnanthemum muticum – mountain mint
- Pycnanthemum tenuifolium – mountain mint
- Pycnanthemum tenuifolium 'Campbell Carpet' – mountain mint
- Pyracantha 'Cadange' – Saphyr Orange firethorn
- Pyracantha 'Red Cushion' – firethorn
- Pyracantha (UNCC dwarf) – firethorn
- ×Pyracomeles 'NCXP1' – Juke Box pyracomeles
- ×Pyracomeles vilmorinii – Vilmorin's pyracomeles
- Pyrenaria spectabilis (2018-008)
- Pyrrosia
- Pyrrosia drakeana – felt fern
- Pyrrosia lingua 'Alabama Gold' – tongue fern
- Pyrrosia lingua 'Hiryu' – tongue fern
- Pyrrosia lingua 'Kei Kan' – tongue fern
- Pyrrosia lingua 'Kel Kan' – tongue fern
- Pyrrosia lingua 'Limon' – tongue fern
- Pyrrosia lingua 'Ogon Nishiki' – tongue fern
- Pyrrosia lingua 'Shishigashira' – crested tongue fern
- Pyrrosia lingua 'Tachiba Koryu' – tongue fern
- Pyrrosia polydactyla
- Pyrus 'NCPX1' – Javelin fastigiate pear
- Pyrus 'Ncpx2' – Chastity ornamental pear
- Quercus
- Quercus canbyi – Chisos oak
- Quercus dentata 'Pinnatifida' – cutleaf Japanese emperor oak
- Quercus ×dysophylla – oak
- Quercus germana – Mexican royal oak
- Quercus glauca – ring-cupped oak
- Quercus glauca 'Lacera' – Japanese blue oak
- Quercus glauca 'Shima Fu' – variegated ring-cupped oak
- Quercus greggii (La Siberia strain) – Mexican evergreen oak
- Quercus hypoleucoides – silverleaf oak
- Quercus ilex – holly oak
- Quercus infectoria subsp. veneris – Aleppo oak
- Quercus insignis – chicalaba
- Quercus 'JFS-kw2qx' – Skinny Genes columnar hybrid oak
- Quercus longinux – Taiwan oak
- Quercus macranthera – Caucasian oak
- Quercus myrsinifolia – bamboo-leaf oak
- Quercus oglethorpensis – Oglethorpe oak
- Quercus palustris 'Pringreen' – Green Pillar columnar pin oak
- Quercus phellos – willow oak
- Quercus phillyreoides –