Ulmus 'Patriot' (original) (raw)

Ulmus 'Patriot' [2] is a hybrid cultivar raised by the United States National Arboretum in 1980. Derived from a crossing of the American hybrid 'Urban' (female parent) with the Wilson's Elm (now treated as Japanese Elm U. davidiana var. japonica) cultivar 'Prospector', 'Patriot' was released to commerce, free of patent restrictions, in 1993. [3] Tested in the US National Elm Trial coordinated by Colorado State University, [4] 'Patriot' averaged a survival rate of 85% after 10 years.