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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 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 |
| 1 | PI 313550 | 'Christine Buisman' | Ulmus minor Mill. | Netherlands | NC7 | | | 1966 | COLLECTED | | | | | | Cultivar | Tree uniform, very erect, medium leafy, much branched. Excellent winter hardiness and spring vigor. | 1234072 | PI 313550 |