Trees to 20 m tall; bark gray-brown, smooth. Branchlets dark
gray, angular, densely gray pubescent when young,
glabrescent. Buds stipitate, with 2 scales, sparsely
pubescent. Petiole 1.5-5.5 cm, densely pubescent; leaf blade
suborbicular, rarely broadly ovate, 4-9 × 2.5-9 cm,
abaxially light green or glaucescent, densely or sparsely
brown hispidulous, rarely subglabrous, sometimes bearded in
axils of lateral veins, adaxially dark green, sparsely
villous, base rounded or broadly cuneate, rarely cuneate or
subcordate, margin undulate-serrate, apex rounded, rarely
acute; lateral veins 5-10 on each side of midvein. Female
inflorescences 2-8 in a raceme, subglobose or oblong, 1-2
cm; peduncle 2-3 mm; bracts 3-4 mm, woody, base cuneate,
apex rounded, 5-lobed. Nutlet broadly ovate, ca. 3 mm, with
papery wings ca. 1/4 as wide as nutlet. Fl. May-Jul, fr.
Jul-Aug.
Native to temperate forests, along streambanks; 700-1500 m.
Heilongjiang, Jilin, Liaoning, Nei Mongol, Shandong [Japan,
Korea, Russia (Siberia)]
The wood is hard and dense, and is used for making
agricultural tools and furniture.
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