大果榆(原变种) da guo yu (yuan bian zhong)

Ulmus macrocarpa var. mandshurica Skvortsov; U. macrocarpa var. mongolica Liou & Li; U. macrocarpa var. nana Liou & Li; U. macrophylla Nakai; U. taihangshanensis S. Y. Wang.

Leaf blade abaxially sparsely pubescent with hairs tufted in axils and forks of secondary veins, adaxially hirsute or with convex trichome scars, base attenuated to rounded, apex shortly caudate. Samaras pubescent, apically concave or rounded, wings thick, stigmas pubescent. Fl. Mar, fr. Apr.

Slopes, valleys; 700-1800 m. Anhui, Gansu, Hebei, Heilongjiang, Henan, Hubei, N Jiangsu, Jilin, Liaoning, Nei Mongol, E Qinghai, Shaanxi, Shandong, Shanxi [Korea, Mongolia, Russia (Far East, E Siberia)].

Ulmus taihangshanensis, described from Henan, differs in having more pubescent twigs that never develop corky wings, and thinner leaves (papery rather than leathery).