Ulmus 'Sapporo Autumn Gold'
Elm cultivar / From Wikipedia, the free encyclopedia
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Ulmus 'Sapporo Autumn Gold' is one of the most commercially successful hybrid elm cultivars ever marketed, widely planted across North America and western Europe, although it has now been largely supplanted by more recent introductions.[1] Arising from a chance crossing of the Japanese elm (female parent) and Siberian elm, seed was sent in 1958 by Prof. Nobuku Takahashi and his colleagues at the Sapporo Botanical Garden of Hokkaido University, Sapporo,[2] to Eugene Smalley at the University of Wisconsin–Madison.[3][4] The patent issued in 1975 has expired, and there are now no propagation restrictions. However, the tree has proven weak-wooded on maturity, and its popularity has waned in Europe as a consequence of susceptibility to wind damage. [5]
Ulmus 'Sapporo Autumn Gold' | |
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Genus | Ulmus |
Hybrid parentage | U. davidiana var. japonica × U. pumila |
Cultivar | 'Sapporo Autumn Gold' |
Origin | seeds: Sapporo, Japan; cultivated: United States |