Trees to 10 m tall, dioecious. Branchlets slender; winter buds small, scales ovate, pubescent. Leaves deciduous; petiole 5-10 mm, pubescent; leaf blade elliptic or oblong-elliptic, 6-12 × 3-5 cm, papery, both surfaces pubescent especially on veins abaxially when young, then glabrescent with only tufts of hairs at vein axils abaxially, 3-foliolate, margin entire or remotely serrate apically, apex acuminate or cuneate. Inflorescence pendulous, racemose, to 7 cm, pubescent. Flowers subsessile or sessile, yellow-green. Sepals 4, ovate, ciliate along margin. Petals 4, white, deciduous before anthesis. Stamens 4, glabrous, rudimentary in pistillate flowers. Disk amphistaminal, small. Ovary glabrous, rudimentary in staminate flowers; style glabrous; stigmas revolute. Fruiting pedicel ca. 2 mm. Nutlets convex, oblong, ca. 1 cm; wing including nutlet ca. 2.5 cm × 5 mm, wings spreading at 90° or erectly. Fl. Apr, fr. Sep.
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