Shrubs or small trees to 8 m, erect. Branches subterete or slightly compressed, glabrous; buds naked or scurfy hairy. Leaves 15-18 cm; petiole 5-6 cm, hirsute or glabrous; axis angled; leaflets 3(-7), terminal 1 larger, with petiolule 1.5-3 cm; leaflet blade ovate to elliptic, 8-12(-15) × 3.5-5(-7) cm, thick papery to leathery, adaxially glabrous, abaxially densely tomentose, base broadly cuneate, decurrent onto petiolule, margin serrate to serrate-crenate, apex acuminate; primary veins (10-)12-14 on each side of midrib. Panicles terminal or lateral, 10-15 cm, densely flowered; bracts linear, glabrous or lanate. Flowers unisexual, ca. 3 mm, appearing after leaves. Staminate flowers: calyx campanulate, ca. 1 mm, teeth deltate; corolla white, lobes linear, equal to stamens, 6-7 mm. Pistillate flowers not seen. Samara spatulate, ca. 3 cm × 5 mm; wing densely scurfy hairy, decurrent to about middle of nutlet, apex rounded or retuse. Fl. May, fr. Jul-Oct.
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