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PI 651794
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| ACCESSION | PLANT NAME | TAXONOMY | ORIGIN | GENEBANK | IMAGE | AVAILABILITY | RECEIVED | SOURCE TYPE | SOURCE DATE | COLLECTION SITE | COORDINATES | ELEVATION | HABITAT | IMPROVEMENT LEVEL | NARRATIVE | | |
|---|
| 0 | PI 566597 | 'Patriot' | Ulmus hybr. | District of Columbia, United States | NC7 | | | 1993 | DEVELOPED | PRE 03/1993 | | | | | Cultivar | Introduced by the U.S. National Arboretum and developed by A. M. Townsend. Crown moderately vase-shaped similar to that of an American elm. Leaves oblong-obovate, doubly serrate, average 103 mm long x 74 mm wide. Summer leaves green, gradually change to yellow in summer. At 13 years, 13.1 m tall with crown spread of 7.6 m. High resistance to Dutch elm. Moderate resistance to elm leaf beetle. Good cold and heat tolerance. Cold hardy to USDA Zone 4. Useful as street, highway, home, or park tree. Parentage: 'Urban Elm' x U. wilsoniana 'Prospector'. | 1461568 | PI 566597 |
| 1 | PI 536049 | 'Frontier' | Ulmus hybr. | District of Columbia, United States | | | Historic | 1989 | DONATED | 11/07/1989 | | | | | Cultivar | Introduced by the U.S. National Arboretum. At 19 years, plant 8.2m tall with crown spread of 4.9m. Crown pyramidal. Leaves lanceolate, doubly serrate. Young leaves red (47A), mature to yellow green (147A). Autumn leaf color red purple (59A). Branch angle average 51 deg. Bark greyed green (197B) with large orange lenticels. Flowers absent. Reliably adaptable to USDA zone 5. Used as street, park, lanscape or highway tree. High resistance to Dutch elm (Ceratocystis ulmi). Moderate resistance to elm beetle (Xanthogaleruca luteola). Hybrid combination of U. carpinifolia x U. parvifolia. | 1430985 | PI 536049 |
| 2 | PI 536050 | 'Prospector' | Ulmus davidiana Planch. var. japonica (Sarg. ex Rehder) Nakai | District of Columbia, United States | NC7 | | | 1989 | DONATED | 11/07/1989 | | | | | Cultivar | Introduced by the U.S. National Arboretum, originally selected by A.M. Townsend and L.R. Schrieber in 1975 from a 1965 planting of U. wilsoniana seedlings in Delaware, Ohio. High level of resistance in both laboratory and field trials to Dutch elm disease (Ceratocystis ulmi) and elm leaf beetle (Xanthogaleruca luteola). Plant 7.0 m tall with crown spread of 6.4 m at 9 years old. Crown vase-shaped, becoming pendulous at a lower height than American elm. Young leaves orange red (35A), maturing to yellow green (144A) to green (137B). Autumn leaf color yellow (13A). Branch angle average 53 deg. Reliably adaptable to USDA zones 4-7. Excellent street, lawn, highway, or park tree. Heat, drought, and cold tolerant. | 1430986 | PI 536050 |