Friends of the Arboretum Newsletter

Number 2

March 1981

J. C. Raulston

Dear Friends of the NCSU Arboretum (now the JC Raulston Arboretum):

The west coast sabbatical is going very well and I am seeing and learning a great amount about landscape plants and have obtained quite a few exciting plants for our arboretum. Most of my time is spent in the San Francisco area where i am living but I have managed one trip south to San Diego and one north to VAncouver to see collections and visit nurseries. Hopefully, many of you will remember the lecture on April 2 announced in the first newsletter as I am anxious to share some of the sights seen with you. For those that cannot make it to the talk, some of the most interesting highlights have included: the magnolias of the Strybing Arboretum in San FRancisco - one of the finest collections in the U.S. with many tender species not grown elsewhere. The arboretum is famous for M. campbelli from Nepal with large white to pink flowers. It is quite tender and requires 20-25 years to bloom from seed; the University of California at Santa Cruz arboretum - one of the largest collections of Proteas in the world, named after the ancient God Proteus who could change form to any shape desired - the plants are enormously varied and have some oft eh most fantastic flowers of any plant group. Coming from South Africa and Australia, none are hardy in N.C.; the great interest of people in the native plants of California with excellent collections at the Tilden Botanic Garden in Berkeley, the Santa BArbara Botanic GArden and Rancho Santa Anna in Claremount - the tremendously varied climatic areas of California have evolved one of the most diverse groups of plants in North America; many fine Japanese gardens - the famous one in San Francisco, an old one Hakone in Saratoga, a brand-new one in Hayward, a superb private one in Beverly Hills, and the wonderful one in Portland, Oregon; the bizarre bit of folk horticulture in Scotts Valley, California where an individual sculpted living trees into incredible shapes - unfortunately about to be bulldozed and lost; a visit to the Mitsch, the daffodil grower mentioned in the last newsletter to see the dozens of beautiful new varieties in flower (we will plant over 100 varieties in the arboretum this fall from their listing); a visit to Roger's garden center in the Los Angeles area - the finest garden center in the world - handling everything but specializing in planters and hanging baskets (one priced at $5,000!); many superb retail nurseries that are wonderful but frustrating since I cannot buy all the things I would like, nurseries carry a much wider range of plants - often 700-1,000 different things - and very reasonably priced because of the huge nursery industry there and good growing conditions. My favorite has been Monte Bello Nursery which you will see frequently on the attached plant list, they sell many rare things in small sizes (often just rooted cuttings) for $.80 to $2.00 - a good way to get things inexpensively. Unfortunately the owners retire in June and their children have no interest in horticulture and it will close at that time.

GET TO KNOW A NEW PLANT FROM THE ARBORETUM

Acer palmatum (Japanese maple)

The red-leafed Japanese maple was chosen as a symbol of the NCSU Arboretum (now the JC Raulston Arboretum) because it represents an improved cultivar of an exotic plant well adapted to north Carolina - the main goal of the Arboretum in type of plants we want to display. Japanese maples are long-lived small trees with few problems once established in the home landscape - rarely growing over 20' tall and thus staying in scale for a residential lot. The species has palm-shaped green leaves but many variations in leaf color and shape have been found among the many millions of seedlings that have been grown by nurserymen. The best or most unusual of these have been named and are propagated by cuttings or grafting to maintain the special characteristics desired. A recent very beautiful (and expensive $40) book, Japanese Maples by J. D. Vertrees - has color photos of dozens of the named varieties and is by far the best guide to this group of plants. Among the most commonly available cultivars are Bloodgood - a dark red leaf retaining its color well in the summer, Crimson Queen - a red cutleaf, a dark red leaf retaining its color well in the summer, Crimson Queen - a red cutleaf, Butterfly - with white marked variegated leaves, Snago Kaku or the Coral Twig Maple - with bright coral branches in winter, and many, many others. You can see about 20 named cultivars in the Arboretum. In North Carolina most nurseries carry some Japanese maples and the best sources for unusual cultivars are New Bern Nurseries and Nelson's Nurseries - both listed in the catalog sources handout from the visitor center. Other North Carolina nurseries are also beginning to propagate different cultivars and more will be available in the near future. Excellent mail-order sources are Greer Gardens - also in that catalog listing and Maplewood Nursery, 311 Maplewood Lane, Roseburg, OR 97470. Unusual cultivars will cost $7.-35. depending on size and rarity.

Perhaps the most common complaint comes from people who buy red-leaved plants that turn green in summer. These are seedling plants that vary greatly in their ability to retain the red pigment through summer heat. In a group of seedlings in the spring, there is no way to distinguish among the plants as to how well they will retain color. Two methods may be used if the red is definitely wanted - (1) buy a vegetatively propagated cultivar such as Bloodgood which was chosen for its ability to stay red. These plants will be slightly more expensive because grafting is more difficult and expensive than growing seedlings or (2) go to your nursery and pick out the darkest colored plants in late August or September after they have gone through the summer heat - if they show good color they will continue to do so in the home garden. But you cannot select seedlings in the spring. Many people are hesitant to buy container maples after midsummer or in the fall because the foliage is burned and scorched - there is nothing wrong with them - the scorching is a temporary problem resulting from container culture and after planting in the ground the scorch will not return the following year. Also very important - the best color develops only in full sun - a red leafed cultivar will become green if planted in heavy shade (same thing is true on the branches of the coral bark maple). Yellow, cream or white variegated cultivars required light shade int eh hot N.C. sun or they will burn badly.

Although somewhat expensive, improved cultivars of Japanese maples will provide decades of pleasure as a quality garden plant with few problems.

NEW SOURCE OF PLANTS ADDRESS

Recently received a 4 page mimeo listing of dwarf plants for bonsai culture - most ranging in price $2.-$15@. Only 32 different plants listed but several but several somewhat different things (e.g. - weeping Japanese larch, Japanese hornbean, Malus zumi, grafted Cork bark Japanese black pines). The address to receive the listing is: Dwarfed Tree Nursery, 17771 Snyder Road, Chagrin Falls, Ohio 44022.

HELP NEEDED

With reductions in federal budgets, and thus to university appropriations, many programs are being cut or reduced. This has resulted in reduced funds for the operation of the Unit 4 horticultural farm where the Arboretum is located and less labor is being hired this summer than in past years. To replace this labor, I am using monies from several sources including our membership fees to hire a student to work in the Arboretum from April through October this year. We have a great need for more support and what I would like to ask is that each present member make an effort to recruit one more member (surely you have one horticultural friend that would enjoy membership). If we could get 70 more members (double our present membership), it would pay for the increased support needed to hire maintenance labor this year. Please consider passing the work and encouragement to your friends (perhaps birthday or other gifts?) - many thanks.

WINTER DAMAGE REPORT

A low of 4°F was reached in the arboretum during the 80-81 winter, and a severe drought also provided extra stress on plants. Some surprising injury patterns developed with severe damage or killing of some plants that had gone through colder winters, and happily, some plants survived well that showed damage in other years or that were not expected to be hardy. Plants killed that survived through previous winters included Laurus nobilis, Ceanothus Skylark, Sequoiadendron giganteum, Davidia involucrata (a major disappointment - had 3 good years of growth on the Dove Tree), Ilex dimorphophylla (no injury in previous years), Viburnum suspensum. Plants severely damaged that will likely sprout back from trunks or the roots include quite a few Buxus, Gardenia radicans, Escallonias, Pittosporum Wheeler's Dwarf (which had never shown injury before), Carex morrowii variegata, all the mondo grass cultivars, Agapanthus, Feijoa sellowiana, Quercus suber, and Myrica californica. Others still await later evaluation to see their status. For good news - and this is one factor all gardeners fully appreciate - as we plant a wide range of things some do fail, but there are also the successes. And they re even more appreciated when uncertain or unexpected. Unknown new plants that were doubtful but have survived include Fitzroya cupressoides (a conifer from Chile and probably the only plant in the eastern U.S.), Cupressus macrocarpa aurea (the golden Monterry cypress), Glyptsotrobus lineatus (a rare deciduous conifer related to bald cypress and the Dawn redwood), Sarcocca ruscifolia (a broadleaf evergreen small shrub_, Taxodium mucronatum (the Mexican bald cypress), Baccharis pilularis Twin Peaks (a California ground cover) and Pinus eldarica (a fast growing pine promoted for Christmas tree use in the west).

As in the past, this year we have beautiful evidence of the value of deep mulching of marginal materials (6-10" deep around the stem with pine bark) in overwintering plants. Plants may be killed back to the mulch but new growth can resprout from the trunk or roots. This is how we saved Euryops, Agapanthus, oleander and other similar marginal plants. It is best to remove the piled mulch as temperatures warm in the spring and new growth begins.

NEW PLANT ACQUISITIONS FOR THE ARBORETUM

Taking advantage of the opportunity to deal with west coast nurseries has allowed me to purchase some long wanted material for the arboretum. So far, about 150 new plants have been sent to Raleigh and most are now being grown in containers in a nursery for planting out this coming fall. Among some of the interesting plants for your future enjoyment are 3 species of Hellenorus, the Christmas Roses blooming December-April; 6 cultivars of tree peonies imported from Japan; 12 cultivars of the japanese Apricot, Prunus mume (described in the last newsletter - I understand the one in the arboretum was spectacular in February); 10 cultivars of Wisteria (planted at the posts behind the French Parterre and will be grown tree form); 12 cultivars of flowering quince, Chaenomeles, white, pink and red flowers on the same plant; 4 Nandinas from a dwarf japanese cultivar, Tsukmo, never over 6" tall to Umpqua Chief - reaching 8 feet; 4 new Blue Hollies, Ilex x meserveae hybrids, of extreme hardiness with good berries and foliage; 6 dwarf weeping groundcover Crepe Myrtles; Parthenocissus henryana, a beautiful grey-veined vine for walls; Betula jacquemontii, the most beautiful of white barked birches, from the Himalayas, and Betula nana - a dwarf birch 6" tall from the Arctic; Quercus ilex, an evergreen oak with foliage that looks like a holly; a variegated Rohdea, a hobbyist collector plant of Japan; 4 species of Corylopsis, February-March yellow-blooming shrubs of great beauty; Stachyurus praecos, a showy flowering shrub with drooping racemes of flower in February; and many others.

SPECIAL TOUR AVAILABLE

In June I will conduct a 10 day tour for the North Carolina Association of Nurserymen to the east coast to visit a wide variety of arboretums, public gardens and nurseries. A few spaces are still available and would be open to Friends of the Arboretum. The tour beings in Vancouver, British Columbia and progresses down the coast with major stops in Seattle, Portland, and concluding in San Francisco. Dates are June 15-24 and the cost is $1,250 per person covering round trip airfare from Charlotte, hotels, transportation and admissions. If interested, please contact Mr. Bill Wilder, Wilder's Nursery, Knightdale, N.C. (919/266-2835) for details.

NEW SOURCES OF HORTICULTURAL ITEMS

If you are looking for an out-of-print horticultural book, chances are you can obtain it from one of the following 2 firms. Two of the best in the U.S. - they often provide books to English sources hunting hard-to-find items.

Bell's Book Store Booknoll Farm

536 Emerson Street Hopewell, NJ 08525

Palo Alto, CA 94301 (609) 466-0522

(415) 323-7822 c/o Elisabeth Woodburn

LANDSCAPE PLANTS IN THE NCSU COLLECTIONS

The following pages of plant listings is a third attempt to develop a checklist of the landscape plants on the NCSU campus and those in the NCSU Arboretum (now the JC Raulston Arboretum) collections. This list has been expanded from the December 1979 list and includes new plants, new classifications, and elimination of a number of plants which did not survive or were found to be named improperly. In addition, the listing has been expanded to include a general location, year and place of acquisiton, if known, and approximate height. The list is incomplete and has many errors or outdated information needing checking, but has been issued as is due to time deadlines and should be considered a working document for modification and change. More detailed mapping of mapping to specific location at the arboretum site will be done during 1982 and further refinement of the taxonomy of the collection will improve this listing. The list will be continued in the summer newsletter.

If available, material for propagation is readily shared with nurserymen, public park departments, and other arboreta and botanical gardens. In addition, anyone with species not included in this listing that would be willing to contribute plants or propagation materials would be welcomed. With little budget for plant purchase, such contributions are essential for continuing expansion of the collection.

The following code is used in the listing Locations

C - NCSU Campus. The letter and digit included after "C" codes to grid maps in a publication on campus plant locations.

G -Gardner Arboretum on the NCSU Campus

M - Method Farm - NCSU Arboretum (now the JC Raulston Arboretum)

N - Nursery or greenhouse - still in a container

Height

HP - Herbaceous perennial dying back to ground annually

GC - Ground cover, spreading and generally under 6"-1' tall

V - Vine growing on trellis

HA - Herbaceous annual requiring greenhouse overwintering and replanting

LANDSCAPE PLANTS IN THE NORTH CAROLINA STATE UNIVERSITY COLLECTIONS - FEBRUARY 1981

Compiled by J. C. Raulston

Scientific Name, Year Acquired & Original Source, Height, Location

Abelia chinensis 80 National Arboretum, D.C. 80-6" M
Abelia grandiflora Old Local N.C. Nursery 80-6' C,M
Abelia grandiflora Dwarf Purple 80 Old Westbury Estate, N.Y. 80-4" M
Abelia grandiflora Francis Mason 80 Mitsch Nursery, OR 80-1' M
Abelia grandiflora nana 70 ?? 80-4' M
Abelia grandiflora prostrata 78 Monrovia Nursery, CA 80-2' M
Abelia grandiflora Sherwood 79 National Arboretum, D.C. 80-1' M
Abeliophyllum distichum 77 Dr. Russell Southall 80-1' M
Abies blasamea nana 80 Flora Knoll Farms, NC 80-6" M
Abies cephalonica 80 Seed 80-2" N
Abies firma 79 National Arboretum, D.C. 80-1' M
Abies grandis 80 Seed 80-2" N
Abies nordmannia prostrata 80 J. Vermeulen & Sons, NJ 80-4" M
Abies pinasapo glauca 80 J. Vermeulen & Sons, NJ 80-6" M
Abies procera 80 Seed 80-2" N
Abies sachalinensis 79 Arnold Arboretum, MA 80-4" M
Acanthopanax gracilistylus 78 National Arboretum, D.C. 80-5' M
Acanthus mollis 78 Monrovia Nursery, CA HP M
Acer barabatum Old ?? 100' C-C37
Acer buergeranum 78 Greer Gardens, OR 80-7' M
Acer buergeranum Miyasama 79 National ARboretum, D.C. 80-4' M
Acer campestre 77 M
Acer capillipes 78 Seed 80-4' M
Acer carpinifolium 79 J.D. Vertrees, OR 80-3' M
Acer circinatum 80 Seed 80-1' M
Acer circinatum Monroe 79 Greer Gardens, OR 80-3' M
Acer davidii 79 M
Acer ginnala Old ?? 80-15' M
Acer griseum 77 Potomac Garden Center,MD 80-4' M
Acer japonicum aconitifolium 78 Greer Gardens, OR 80-2' M
Acer japonicum aureum 78 Greer Gardens,OR 80-8" M
Acer japonicum Maiku Jaku 79 Greer Gardens, OR 80-1' M
Acer macrophyllum 80 Monte Bello Nursery, CA 80-1' N
Acer maximowiczii 79 J. D. Vertrees, OR 79-5' M
Acer mono 79 J. D. Vertrees, OR 80-2' M
Acer negundo Old ?? 79-36' C-C36
Acer negundo albo-variegata 80 Arnold Arboretum, MA 80-1' M
Acer palmatum ?? 79-4' C-C33
Acer palmatum Akaji Nishiki 79 J. D. Vertrees, OR 79-2' M
Acer palmatum Assai Nishiki 79 J. D. Vertrees, OR 79-1' M
Acer palmatum atropurpureum 79 Local homeowner from yard 79-7' M
Acer palmatum atrolineare 79 J. D. Vertrees, OR 80-2' M
Acer palmatum Burgundy Lace 78 Greer Gardens, OR 78-1' M
Acer palmatum Butterfly 79 Greer Gardens, OR 79-1' M
Acer palmatum dissectum atropurpurea 80 Local homeowner from yard 80-15' M
Acer palmatum dissectum Seiryu 79 J. D. Vertrees, OR 79-1' M
Acer palmatum dissectum Tamukeyama 78 National Arboretum, D.C. 79-1' M
Acer palmatum Everred 80 Nelson Nursery, N.C. 80-1' M
Acer palmatum Garnet 80 Nelson Nursery, NC 80-1' M
Acer palmatum Hanami Nishiki 79 J. D. Vertrees, OR 80-2' M
Acer palmatum Higasayma 79 J. D. Vertrees, OR 80-4' M
Acer palmatum Kamagata 79 J. D. Vertrees, OR 80-2' M
Acer palmatum Karasugawa 79 J. D. Vertrees, OR 79-3' M
Acer palmatum Mama 79 J. D. Vertrees, OR 80-2' M
Acer palmatum Okushimo 79 J. D. Vertrees, OR 80-2' M
Acer palmatum Oshio-Beni 78 Greer Gardens, OR 80-3' M
Acer palmatum Red Pygmy 79 J. D. Vertrees, OR 80-1' M
Acer palmatum Sango Kaku 78 Greer Gardens 80-4' M
Acer palmatum shindeshojo 79 J. D. Vertrees, OR 80-2' M
Acer palmatum Tamureyama 78 Greer Gardens, OR 79-1' M
Acer palmatum The Bishop 78 National Arboretum, D.C. 80-3' M
Acer palmatum Trompenburg 80 Mone Bello Nursery, CA 80-4" N
Acer palmatum Tsukumo 78 Greer Gardens, OR 78-2' M
Acer palmatum Versicolor 78 Greer Gardens, OR 78-1' M
Acer platanoides Old ?? C
Acer pseudoplatanus Brilliantissimum 79 J. D. Vertrees, OR 79-1' M
Acer rubrum Old ?? 55' C-B32
Acer rubrum October Glory Old Princeton Nursery, N.J. 79-15' M
Acer rubrum var. trideus Old 79-85' C-B32
Acer saccharinum C
Acer saccharum Old 79-24' C-B32
Acer saccharum var. sacharum Old 79-40' C-B32
Acer saccharum Sentry Old Princeton Nursery, N.J. 79-15' M
Acer semenovii 77 National Arboretum, D.C. 79-4' M
Acer shirasavanum palmatifolium 78 78-6" N
Acer spicatum 79 79-4" N
Acer triflorum 79 J. D. Vertrees, OR 79-1' M
Acorus gramineus 80 HP M
Acorus gramineus minimus 80 Monte Bello Nursery, CA HP M
Acorus gramineus variegata 79 Kridler Nursery, TX HP M
Actinidia arguta 78 Cornell Plantations, NY V M
Aesculus carnea 79 Monrovia Nursery, CA 80-2' M
Aesculus octandra Old 79-32' C-B30
Aesculus 79 UNC Botanic Garden, NC 80-1' M
Agapanthus africanus 79 Monrovia Nursery, CA HP M
Agapanthus africanus laba nana 79 Monrovia Nursery, CA HP M
Agapanthus africanus Peter Pan 79 Monrovia Nursery, CA HP M
Agapetes serpens 80 Strybing ARboretum, CA 80-4" N
Agave americana (??) 80 Dallas retail nursery, TX 80-1' M
Agave parryi huachucensis 79 Strybing Arboretum, CA 80-4" N
Agave utahensis 80 Seed - Univ. of Utah 80-1" N
Ailanthus altissima Old Wild seedling 80-40' C
Ajuga chamaepitys 80 Berkeley Bot. Garden, CA 80-3" N
Ajuga reptans 76 GC M
Ajuga reptans alba 78 Powell's Gardens, NC GC M
Ajuga reptans Greyleaf 78 GC M
Ajuga reptans macrophylla 79 Powell's Gardens, NC GC M
Ajuga reptans metallica crispa 78 GC M
Ajuga reptans Pink Beauty 78 Powell's Gardens, NC GC M
Ajuga reptans Rippleleaf 78 Jim Cooper, NC GC M
Ajuga reptans tricolor 77 GC M
Akebia quinata 78 Dr. Russell Southall V M
Akebia trifoliata 80 Kew Gardens, England V M
Albizia julibrissin Old 79-25' C-B35 Alchemilla vulgaris 80 Arnold Arboretum 80-GC M
Alnus glutinos 78 80-9' M
Alnus luisuta 80 80-1' M
Alnus pendula 79 80-2' M
Alnus rhombifolia 78 78-4' M
Alnus subcordata 79 80-4' M
Alpina media 80 Morris ARboretum, PA 80-4" N
Ampelopsis brevipedunculata 80 Monte Bello Nursery, CA 80-1' N
Ampelopsis Beverly Brooks 78 Monrovia Nursery, CA V M
Aralia spinosa 78 Collected locally 80-3' M
Araucaria bidwilli 78 Monrovia Nursery, CA 80-7' N
Araucaria araucaria imbricata 80 Monte Bello Nursery, CA 80-1' N
Arbutus unedo campacta 77 Monrovia Nursery, CA 80-4' M
Arctostaphylos densiflora Howard McMinn 78 Monrovia Nursery, CA 78-1' M
Arctostaphylos Kinnickinick 80 Bob Walters 80-4" M
Ardisia japonica 78 National Arboretum, D.C. 80-3" M
Ardisia japonica Shirodu Chirimen 80 National Arboretum, D.C. 80-3" N
Aronia arbutifolia 79 80-5' M
Aronia arbutifolia Brilliantissima 80 Plantings Field Aboretum, NY 80-3" M
Aronia melanocarpa 80 Plantings Field Aboretum, NY 80-10" M
Arundinaria tecta 78 Blue Mount Nursery, MD M
Arundinaria viridi-striata 77 Blue Mount Nursery, MD M
Arundo donax versicolor 78 Blue Mount Nursery, MD Grass M
Asclepias incarnata 80 UNC Botanical Gardens, NC HP M
Asclepias tuberosa 80 UNC Botanical Gardens, NC HP M
Asiminia triloba 79 UNC Botanical Gardens, NC 80-6' M
Athyrium niponicum 80 Plantings Field Arboretum, NY HP M
Aucuba japonica Croton 79 80-1' M
Aucuba japonica dwarf green 78 80-1' M
Aucuba japonica luteocarpa 79 National Arboretum, D.C 80-1' M
Aucuba japonica salififolia 79 80-1' M
Aucuba japonica serratifolia 79 80-1' M
Aucuba japonica veriegata 78 Taylors Nursery, NC 80-2' M
Baccharis pilularis Twin Peak 80 Saratoga Hort. Found. CA GC M
Baccharis sp. 79 Collected N.C. 79-2' M
Bambusa multiplex 78 Blue Mount Nursery 78-1' M
Baptisia pendula 80 UNC Botanical Garden, NC HP M
Berberis gagnepanii 80 Arnold Arboretum, MA 80-4" M
Berberis gladwynensis William Penn 78 Monrovia Nursery, CA 80-1' M
Berberis haematocarpa 80 Arnold ARboretum, MA 80-3" M
Berberis julianae Old NC Nursery 80-5' C-B35
Berberis sargentiana 78 M
Berberis thunbergi atropurpurea 78 Taylors Nursery, NC 80-2' M
Berberis thunbergi atropurpurea nana 78 80-1' M
Berberis thunbergi atropurpurea Gold Ring 78 Brookside Gardens, MD 80-1' M
Berberis thunbergi atropurpurea Rosy Glow 78 Brookside Gardens, MD 80-2' M
Berberis thunbergi aurea 79 80-1' M
Berberis thunbergi Kobold 78 Arnold Arboretum, MA 80-1' M
Berberis triancanthophora 78 80-1' M
Bergenia cordifolia 80 Plantings Field Arboretum,NY GC M
Betula alba 79 80-10' M
Betula costata 77 M
Betula jacquemontii 80 Monte Bello Nursery, CA 80-2' N
Betula maximowicziana 78 M
Betula microphylla 80 80-1' M
Betula middendorfii 78 M
Betula nana 80 Monte Bello Nursery, CA 80-1" N
Betula nigra Old NC Nursery 60' C-B37
Betula schmidti
Buddlea japonica 78 80-4' M
Buddlea venenifera 78 78-2' M
Buxus balaerica 79 National Arboretum, D.C. 79-4" M
Buxus Brouwer's Seedling 79 National Arboretum, D.C 79-8" M
Buxus ? Fine Leaf 79 79-4" M
Buxus harlandi 78 78-6" M
Buxus microphylla Curlylocks 78 78-6" M
Buxus microphylla koreana 79 National Arboretum, D.C. 79-6" M
Buxus microphylla japonica M
Buxus microphylla Kingsville buxifolia M
Buxus microphylla Kingsville Dwarf 78 National ARboretum, D.C. 78-4" M
Buxus microphylla Morris Midget 78 National Arboretum, D. C. 78-4" M
Buxus microphylla sinica 79 79-6: M
Busus Richardi 78 78-6" M
Buxus sempervirens C
Buxus sempervirens (U. Va. Cv. - NA33789) 79 National Arboretum, D.C. 79-6" M
Buxus sempervirens Anderson 78 National Arboretum, D.C. 78-6" M
Buxus sempervirens argenteo-variegata 78 National Arboretum, D.C. 78-1' M
Buxus sempervirens elegantissima 78 National Arboretum, D.C. 78-1' M
Buxus sempervirensfastigata 79 National ARboretum, D.C. 79-1' M
Buxus sempervirens globosa M
Buxus sempervirens Hardwickensis 79 National Arboretum, D.C. 79-1' M
Buxus sempervirens koreana 79 79-6" M
Buxus sempervirens latifolia maclata 79 National Arboretum, D.C. 79-8" M
Buxus sempervirens latifolia rotundifolia 79 National Arboretum, D.C. 79-1' M
Buxus sempervirens macrophylla M
Buxus sempervirens myrtifolia 79 National Arboretum, D.C. 79-1' M
Buxus sempervirens prostrata 79 National Arboretum, D.C. 79-8" M
Buxus sempervirens pyramidalis 79 National Arboretum, D.C. 79-6" M
Buxus sempervirens salicifolia elata 79 National Arboretum, D.C. 79-1' M
Buxus sempervirens suffruiticosa M
Callicarpa americana Old 79-4' C-C31
Callicarpa bodinieni 80 80-3" M
Callicarpa cathayana 80 80-1' M
Callicarpa japonica leucocarpa 80 80-10" M
Callicarpa pilosissima 80 80-10" M
Callicarpa tosaensis 78 National Arboretum, D.C. 80-5' M
Calluna vulgaris Lynnen Proudley 80 Flora Knoll Farms, NC 80-3" M
Calluna vulgaris Peter Sparkles 80 Flora Knoll Farms, NC 80-6" M
Calluna vulgaris Vivelli 80 Flora Knoll Farms, NC 80-4" M
Camellia japonica Old 80-10' C,M
Camellia japonica Nakifude Old 80-9' M
Camellia oleifera Old 80-6' M
Camellia reticulata Buddha 79 Monrovia Nursery, CA 79-2' M
Camellia sasanqua Old 80-12' C-C35
Camellia sasanqua White Doves 80 80-1' M
Camellia sasanqua Yuletide 80 Monrovia Nursery, CA 80-2' M
Camellia sinensis Old 80-5' C-C31
Campsis radicans Old Campus-Wild V C
Campsis radicans flava 78 Swiss Pines Gardens, PA V M
Campsis tagliabuana Madame Galen 79 Monrovia Nursery V M
Carex grayi 79 Brookside Gardens, MD HP M
Carex morrowii variegata (Evergold) 79 Kridler ursery, TX HP M
Carex pseudocyprus 80 Seed HP M
Carpinus caroliniana Old 80-30' C-B31
Carya illinensis Old 80-65' C-B28
Carya pallida Old 80-44' C-C35
Caryopteris X clandonensis Dark Knight 77 80-2' M
Cassandra calyculata 79 UNC Botanical Garden, NC 80-18" M
Castanea mollisima Old 80-30' C-C38
Castanea pumila C
Catalpa speciosa Old 80-25' C-B35
Ceanothus thyrisiflorus Skylark 78 Monrovia Nursery, CA 80-2' M
Cedrela sinensis 78 Arnold Arboretum
Cedrus atlantica 80 80-2' M
Cedrus atlantica aurea 80 J. Vermulen & Son, NJ 80-8" M
Cedrus atlantica glauca pendula 79 Monrovia Nursery, CA 80-5' M
Cedrus atlantica glauca pendula variegata 77 Raraflora Nursery, PA 80-3' M
Cedrus brevifolia 80 Seed 80-2" M
Cedrus deodara Old 80-55' C-B28
Cedrus deodara Descancio Dwarf 79 Greer Gardens, OR 80-1' M
Cedrus deodara Kashmir 77 ? Nursery, TN 80-5' M
Cedrus deodara viridis prostrata 79 Greer Gardens, OR 80-1' M
Cedrus libani 78 N
Cedrus libani stenocoma 80 Arnold Arboretum, MA 80-4" M
Celastrus orbiculatus 78 V M
Celtis sinensis japonica 80 80-5" N
Cephalotaxus harringtonis fastigata Old 80-6' M
Cercidiphyllum japonicum 78 Seed 80-3' M
Cercis canadensis Old 80-20' C-B30
Cercis canadensis Old 80-15' C-B31
Cercis canadensisForest Pansy 79 Kridler Nursery, TX 80-6' M
Cercis canadensis Oklahoma 80 Buchanan Nursery, NC 80-5' M
Cercis chinensis Old 80-14' C-B30
Cercis occidentalis 79 Bob Walters 80-1' N
Celtis laevigata Old 80-25` C-B36
Celtis occidentalis Old 80-25' C-B37
Chaenomeles japonica Chojubai 80 Monte Bello Nursery, CA 80-4" M
Chaenomeles japonica Hine 80 Monte Bello Nursery, CA 80-3" N
Chaenomeles speciosa alba Old C
Chaenomeles speciosa Apple Blossom 80 Monte Bello Nursery, CA 80-4" N
Chaenomeles speciosa Bonsai Princess 80 Monte Bello Nursery, CA 80-3" N
Chaenomeles speciosa Cameo 77 80=2' M
Chaenomeles speciosa Charlotte 80 Monte Bello Nursery, CA 80-3" N
Chaenomeles speciosa contorta 80 Monte Bello Nursery, CA 80-2" N
Chaenomeles speciosa Kuro 80 Monte Bello Nursery, CA 80-3" N
Chaenomeles speciosa Orange Delight 80 Monte Bello Nursery, CA 80-4" N
Chaenomeles speciosa Pink Lady 77 79-4' M
Chaenomeles speciosa Spitfire 78 80-4' M
Chaenomeles speciosa Stanford Red 80 Monte Bello Nursery, CA 80-3" N
Chaenomeles speciosa Texas Scarlet 77 Greenleaf Nursery, TX 80-4' M
Chaenomeles speciosa Toyo Nishiki 77 Greer Gardens, OR 80-2' M
Chaemaecyparis lawsoniana 80 Bob Walters 80-2' N
Chamaecyparis lawsoniana allumii 78 79-6" M
Chamaecyparis lawsoniana albo-spicata 80 80-3" N
Chamaecyparis lawsoniana Azurea 80 80-1' M
Chamaecyparis lawsoniana Forsteckensis 80 Monte Bello Nursery, CA 80-4" N
Chamaecyparis lawsoniana Stewartii 79 Monrovia Nursery, CA 80-3' M
Chamaecyparis nootkantensis pendula 78 80-2' M
Chamaecyparis obtusa aurea 77 79-4" M
Chamaecyparis obtusa ericoides 77 M
Chamaecyparis obtusa filicoides 77 M
Chamaecyparis obtusa formosana 80 Morris Arboretum, PA 80-4" N
Chamaecyparis obtusa lycopoides 80 80-3" N
Chamaecyparis obtusa mariesi 78 79-6" M
Chamaecyparis obtusa minima variegata 79 79-8" M
Chamaecyparis obtusa nana aurea 80 80-4" M
Chamaecyparis obtusa nana lutea 78 79-6" M
Chamaecyparis obtusa pygmea 78 79-4" M
Chamaecyparis obtusa Reiss Dwarf 77 79-6" M
Chamaecyparis obtusa rumosa kos. 77 79-1' M
Chamaecyparis obtusa Sanderi 77 79-1' M
Chamaecyparis obtusa tetragona aurea 77 79-2' M
Chamaecyparis obtusa torulosa 77 79-1' M
Chamaecyparis obtusa variegata 80 Strybing Arboretum, CA 80-4" N
Chamaecyparis pisifera Old C
Chamaecyparis pisifera aurea nana 78 79-1' M
Chamaecyparis pisifera filifera Old 80-20' M
Chamaecyparis pisifera filifera aurea 78 79-1' M
Chamaecyparis pisifera Gold Spangle 78 M
Chamaecyparis pisifera juniperiodes aurea 77 M
Chamaecyparis pisifera minima aurea 77 79-4" M
Chamaecyparis pisifera minima variegata 77 79-6" M
Chamaecyparis pisifera plumosa Old 80-30' C-C29
Chamaecyparis pisifera plumosa Crippsii 77 80-3' M
Chamaecyparis pisifera plumosa Rogersii 78 79-1' M
Chamaecyparis pisifera Snow 77 79-1' M
Chamaecyparis pisifera squarrosa 77 79-2' M
Chamaecyparis pisifera squarrosa lutea 78 79-2' M
Chamaecyparis pisifera squarrosa Miko 79 79-4" M
Chamaecyparis pisifera squarrosa minima 78 79-6" M
Chamaecyparis tetragonia cv. Rumos 78 79-1' M
Chamaecyparis thyoides 77 79-3' M
Chamaecyparis thyoides andelyensis conica 79 79-6" M
Chimonanthus praecox 80 Monte Bello Nursery, CA 80-6" N
Chimonanthus yunnanensis 79 79-4" N
Chionanthus retusus 79 Kridler Nursery, TX 79-4' G
Chionanthus virginicus Old 80-20' C-C36
Chrysogonum virginiana 80 UNC Botanical Gardens, NC HP M
Citrus taiwanica 80 Callaway Gardens, GA 80-4' M
Cladrastis lutea Old 80-18' C-C28
Clematis Henryi 80 Taylors Nursery, NC 80-V N
Clematis Pink Chiffon 80 Taylors Nursery, NC V M
Clerodendrum trichotomum 78 80-7' M
Clethra alnifolia 79 UNC Botanical Gardens, NC 79-1' M
Clethra alnifolia Pinkspire 80 Wayside Gardens Nursery, SC 80-2' N
Clethra barbinervis 80 National Arboretum, D.C. 80-2' M
Clivia miniata 80 Monte Bello Nursery, CA HP N
Colchicum 80 Broadleigh Gardens, England HP M
Acrippinum, autumnale, autumnalis album, autumnalis plenum, bornmulleri, bysantinum, Lilac Wonder, luteum, speciosum,
The Giant, Violet Queen
Convolvulus cneorum 80 Monte Bello Nursery, CA 80-6" N
Chrysanthemum maximu - May Quenn, Secundum, Star of Antwerp, Lucky Star
79 Benson Kirkman HP M
Cornus alba X P.I. 367881 78 79-2' M
Cornus alba variegata 78 79-3' M
Cornus capitata 80 Monte Bello Nursery, CA 80-1' N
Cornus controversa 79 U. of Wash. Arboretum, WA 80-2' M
Cornus X Eddie's White Wonder 79 Greer Gardens, OR 80-7' M
Cornus elegantissima lutea variegata 80 80-1' M
Cornus florida Old 80-15' C
Cornus florida Barton 80 80-2' M
Cornus florida First Lady 79 80-6' M
Cornus florida flora plena 80 Flora Knoll Farms, NC 80-6" M
Cornus florida pendula Old 80-4' C
Cornus florida Purple Glory 80 Greer Gardens, OR 80-3' M
Cornus florida rubra Old 80-15' C-B28
Cornus kousa 78 Seed 80-4' M
Cornus kousa chinensis Summer Stars 79 Wayside Gardens 80-4' M
Cornus mas 80 Monte Bello Nursery, CA 80-6" N
Cornus mas aurea 80 National ARboretum, D.C. 80-6" M
Cornus mas nana 79 Arnold ARboretum, MA 80-1' M
Corokia cotoneaster 80 Monte Belloe Nursery 80-3" N
Cortaderia selloana 78 Taylors Nursery, NC Grass M
Cortaderia selloana Gold Band 80 Greenleaf Nursery, TX Grass M
Corylopsis pauciflora 80 Gossler Farms Nursery, OR 80-1' N
Corylopsis sinensis 80 Gossler Farms Nursery, OR 80-2' N
Corylopsis spicata 80 Gossler Farms Nursery, OR 80-2' N
Corylus americana M Corylus avellena 80 80-4' M
Corylus avellana contorta 79 80-4' M
Corylus avellaena pendula 80 Arnold Arboretum, MA 80-6" M
Corylus corluna 70 Princeton Nursery, NJ 80-15' M
Cotinus NA 33348 79 National Arboretum, D.C. 79-2' M
Cotinus americanus C
Cotinus coggygria 77 Taylors Nursery 80-10' M
Cotinus coggygria Royal Purple 80 Monte Bello Nursery, CA 80-3" N
Cotoneaster 77833 78 80-4' M
Cotoneaster 77834 78 80-5' M
Cotoneaster 77837 78 80-3' M
Cotoneaster 77838 78 80-4' M
Cotoneaster 77862 78 80-4' M
Cotoneaster adpressa Little Gem 78 80-8' M
Cotoneaster congesta 79 79-1' N
Cotoneaster conspicua var. decora 79 79-1' N
Cotoneaster dammeri radican 78 80-1' M
Cotoneaster dammeri Skogholmen 80 80-1' N
Cotoneaster glaucophylla 78 80-1' M
Cotoneaster horizontalis 76 80-2' M
Cotoneaster horizontalis variegata 78 80-1' M
Cotoneaster hybrid John Waterer 78 80-6' M
Cotoneaster microphylla 79 80-2' M
Cotoneaster microphylla thymifolia 78 80-1' M
Cotoneaster parneyi 79 79-2' M
Cotoneaster salicifolia rpenes 77 Longwood Gardens, PA 80-2' M
Cotoneaster X wateri 79 79-1' M
Cotoneaster zabeli 78 79-1' M
Crataegus phaenopyrum Old 79-24' C-B29
Crocus Sp. - Karduchorum, laevigatus fontenayi, 80 Broadleigh Gardens, England Bulbs M
medius, ochroleucus, salzmani, sativus, speciosus,
speciosus aitchisonii, speciosus artabia, zonatus
Cryptomeria japonica Old 79-30' C-C37
Cryptomeria japonica aurescens 79 80-3' M
Cryptomeria japonica Bandai-Sugi 77 80-2' M
Cryptomeria japonica Benny's Best 80 New Bern Nursery, NC 80-5' M
Cryptomeria japonica cristata 79 80-18" M
Cryptomeria japonica dacyrloides 80 Flora Knoll Farms, NC 80-2' M
Cryptomeria japonica Jundai-Sugi 77 80-3' M
Cryptomeria japonica Knaptonensis 77 80-1' M
Cryptomeria japonica nana 77 80-1' M
Cryptomeria japonica Sekkan Sugi 79 80-3' M
Cryptomeria japonica sprialis 79 80-3" M
Cryptomeria japonica Tansu 80 Mitsch Nursery, OR 80-3" M
Cryptomeria japonica variegata 78 79-1' M
Cryptomeria japonica Vilmoriniana 77 80-1' M
Cudrania tricuspidata 78 80-6' M
Cunninghamia koniskii 79 Seed 80-1' N
Cinninghamia lanceolata Old 79-35' C
Cunninghamia lanceolata glauca 79 Taylors Nursery, NC 80-4' M
Cuphea hyssopifolia 79 Annual M
Cupressocyparis X leylandii 77 Tinga Nursery, MD 80-17` M
Cupressocyparis X leylandii Castlewellan 78 Greer Gardens, OR 80-7' M
Cupressocyparis X leylandii Haggerstown Grey 78 Univ. of Tenn. Arb., TN 80-4' M
Cupressocyparis X leylandii Naylor's Blue 79 National Arboretum, D.C. 80-2' M
Cupressocyparis X leylandii Silver Dust 79 National Arboretum, D.C. 80-2' M
Cupressocyparis X leylandii variegata 78 80-4' M
Cupressus abramsiana 80 Seed 80-1' N
Cupressus arizonica Old 80-20' C
Cupressus arizonica Gareei 78 Monrovia Nursery 80-7' M
Cupressus bakeri 80 Bob Walters 80-1' M
Cupressus funebris (??) 80 New Bern Nurseries, NC 80-6' M
Cupressus goveniara Gloria Green 80 Monte Bello Nursery, A 80-2" N
Cupressus lusitanica 80 Seed 80-2" N
Cupressus macrocarpa 79 Monrovia Nursery, CA 80-6' M
Cupressus macrocara contorta 79 Powell's Gardens, NC 80-1' M
Cupressus macrocarpa Donard Gold 80 Monrovia Nursery, CA 80-2' M
Cupressus macrocarpa pygmea 80 Monte Bello Nursery, CA 80-1" N
Cupressus sargentii 79 79-1' N
Cupressus sempervirens glauca 77 Taylors Nursery, NC 80-5' M
Cupressus sempervirens Swanes Golden 80 Monrovia Nursery, CA 80-1' M
Cydonia sinensis 80 Monte Bello Nursery, CA 80-1' N
Cyrilla racemiflora Old 80-7' M
Cytisus burkwoodi 78 Monrovia Nursery, CA 80-2' M
Cytisus Lilac Time 78 Monrovia Nursery, A 80-3' M
Cytisus praecox Moonlight 78 Monrovia Nursery, CA 80-2' M
Cytisus purgans 80 80-4" M
Dahlia imperialis 79 Leaning Pine Arboretum, CA HP-7' M
Danae racemosa 77 Taylors Nursery, NC 80-2' M
Daphne burkwoodii 80 80-3" M
Daphne burkwoodii Carol Makie 80 Planings Field ARboretum, NY 80-6" M
Daphne caucasica variegata 79 80-6" M
Daphne collina var. neapolitana 80 80-2" N
Daphne odora 77 Taylors Nursery, NC 80-2' M
Daphne odora aureomarginata 77 Taylors Nursery, NC 80-1' M
Davidia involucrata 78 Greer Gardens, OR 80-3' M
Dechisnea fargesii 79 79-6" M
Decumaria barbara 78 V M
Dendromecon harfordii 80 Saratoga Horticultural Foundation HP N
Deutzia gracilis 80 Plantings Field Arboretum, NY 80-1' M
Deutzia gracilis variegata 80 Kew Gardens, England 80-1' M
Deutzia kalmifolia 78 80-4' M
Deutzia parviflora 80 80-1' M
Dicentra Luxurient 80 Wayside Gardens, SC HP N
Diervilla sessifolia 80 Arnold Arboretum, MA 80-1' M
Diospyros kaki (2 Cv. but names lost) 77 Dr James Ballington, NCSU 80-4',7' M
Diospyros virginiana Old Native 80-24' M
Dodonaea viscosa 79 Leaning Pine Arboretum, CA 80-2' M
Dryopteris ludoniciana 80 80-HP N
Elaeagnus angustifolia M
Elaeagnus Clemsoni variegata 78 Dr. Tom Krenitski, NC 80-2' M
Elaeagnus pungens M
Elaeagnus pungens reflexa 78 M
Embothrium coccineum 80 Seed 80-2" N
Enkianthus campanulatus 78 Seed - Mr. Bill Gensel 80-2' M
Enkianthus perulatus 80 Plantings Field ARboretum, NY 80-4" N
Epimedium grandiflorum 80 Arnold ARboretum, MA 80-2" M
Equisetum scirpoides 80 Monte Bello Nursery, CA 80-2" N
EricaArthus Johnson 80 Flora Knoll Farm, NC 80-10" M
Eriobotrya japonica Old 80-9' M
Escallonia fradesi 78 Leaning Pine Arboretum, CA Dies to ground M
Escallonia rubra 78 Leaning Pine Arboretum, CA Dies to ground M
Escallonia Pride of Donard 80 80-1' M
Escallonia montevidensis oregonensis 80 Berkeley Botanic Garden, CA 80-6" N
Eucalyptus sp. 78 Taylors Nursery, CA 80-4' M
Eucalyptus gunni 80 Greer Gardens, OR 80-4' N
Eucalyptus niphophila 80 Greer Gardens, OR 80-4' N
Eucommia ulmoides Old Princeton Nursery, NJ 80-12' M
Euonymus alatus Old 80-7' C
Euonymus alatus compacta 77 Taylors Nursery, NC 80-2' M
Euonymus alatus variegatus 80 Brookside Gardens, MD 80-3" M
Euonymus americanus 78 80-4' M
Euonymus europea 79 80-2' M
Euonymus fortunei coloratus 78 M
Euonymus fortunei Emerald Gaiety 78 80-2' M
Euonymus fortunei Emerald & Gold 78 M
Euonymus fortunei Golden Prince 78 Monrovia Nursery, CA M
Euonymus fortunei gracilis 78 M
Euonymus fortunei Kewensis 77 M
Euonymus fortunei Longwood 77 Longwood Gardens, PA 80-1" M
Euonymus fortunei minimus 80 M
Euonymus fortunei vegetatus 77 M
Euonymus grandiflorus 80 80-2' M
Euonymus japonica albo-marginus 77 M
Euonymus japonica aureovariegata 78 M
Euonymus japonica microphyllus 77 Taylors Nursery, NC 80-1' M
Euonymus japonica microphyllus variegatus 78 Monrovia Nursery, CA 80-8" M
Euonymus kiauchovicus 77 M
Euonymus nana Koopmans 77 Goemer Botanic Gardens, WS 80-2' M
Euonymus fortunei variegata 80 Brookside Gardens, MD 80-5" M
Eurya emarginata 78 National Arboretum, DC 80-1' M
Evodia daniellii 80 Morris Arboretum, PA 80-1' N
Evodia meliaefolia 80 80-2' N
Exochorda korolkowii 79 80-1' M
Exochorda racemosa 77 Seed 80-3' M
Euryops pectinatus 80 Strybing Arboretum, CA HP(A) M
Fagus crenata 80 National ARboretum, DC 80-1' N
Fagus grandifolia Old 150' C-C37
Fagus sylvatica pendula 80 Peters & Wilson Nursery, CA 80-1' N
Fagus sylvatica tricolor 80 Peters & Wilson Nursery, CA 80-1' N
Fatzhedera 80 Taylors Nursery, NC 80-3' M
Feijoa sellowiana 78 Taylors Nursery, NC 80-3' M
Felicia amelloides 80 Monte Bello Nursery, CA HA N
Firmiana simplex 77 Seed 80-14' M
Fitzroya cupressoides 80 Berkeley Botanic Garden, CA 80-8" M
Forsythia intermedia 77 80-5' M
Forsythia intermedia Arnold Dwarf 78 80-1' M
Forsythia intermedia aurea 80 80-6" M
Forsythia intermedia bronxensisrf 80 80-4" M
Forsythia intermedia Lynwood Gold 80 Plantings Field Arboretum, NY 80-6" M
Forsythia intermedia Spring Glory 80 Plantings Field ARboretum, NY 80-6" M
Forsythia ovata 79 80-2' M
Forsythia suspensa 78 C
Forsythia viridissima C
Fothergilla gardeni 80 Plantings Field Arboretum 80-4" M
Fothergilla parviflora 80 Plantings Field Arboretum 80-4" M
Franklinia alatamaha 77 UNC Botanic Garden, NC 80-9' M
Fraxinus americana Old 79-28' C-B28
Fraxinus americana Madison Old Princeton Nursery, NJ 79-18' M
Fraxinus americana male Old Princeton Nursery, NJ 79-18' M
Fraxinus americana Rosehill 79 Monrovia Nursery, CA 80-9' M
Fraxinus lamiginosa 79 79-1' M
Fraxinus longicuspis 80 National ARboretum, DC 80-1' M
Fraxinus pennsylvanica Old 79-35' C-C32
Fraxinus sieboldiana 79 80-2' M
Fraxinus velutina glabra Old Princeton Nurseyr, NJ 80-17' M
Fremontodendron mexicanum 80 City College of SF, CA 80-4" N
Gaillardia Goblin 79 Benson Kirkman HP M
Gardenia fortuniana Veitchi 77 Taylors Nurery, NC 80-4' M
Gardenia radicans 79 Taylors Nursery, NC 80-1' M
Gaultheria procumbens 80 Bob Walters 80-1' M
Garrya elliptica James Roof 79 Greer Gardens, OR 80-2' N
Gelsemium sempervirens 78 Taylors Nursery, NC V M
Genista pedunculata diffusa 80 Kew Gardens, England 80-3" M
Ginkgo biloba Old 79-30' C-B38
Gleditsia triacanthos var inermis Moraine Old 79-45' C-B29
Gleditsia melanacantha 79 National Arboretum, DC 80-7' M
Glyptostrobus lineatus 80 Berkeley Botanic Garden, CA 80-2' M
Gordonia axillaris 80 Arnold Arboretum 80-3" M
Gordonia Lasianthus 77 UNC Botanic GArden, NC 80-5' M
Gunnera chilensis 80 Strybing Arboretum, CA HP N
Gymnocladus dioica Old 80-12' C
Halesia carolina Old C
Hamamelis X intermedia Arnold Promise 78 80-3' M
Hamamelis X intermedia Jelana 78 80-5' M
Hamamelis mollis 80 Girard Nursery, OH 80-1' M