Trees 20-30 m. Buds narrowly conical, densely dark-brown tomentose, becoming shiny when dry; branchlets compressed when young. Leaves 10-30 cm; petiole 5-8 cm; leaf axis adaxially plane; leaflets 3-5(-7); petiolule (0.5-)1-1.5 cm; leaflet blade oblong, elliptic-lanceolate, or lanceolate, 6-9(-13) 2-3.5(-4.5) cm, papery becoming lathery, glabrous, base cuneate or blunt, serrate or entire below the middle, apex acute, acuminate, to caudate; primary veins 7-11 on each side of midrib. Panicles terminal or terminal and lateral, 20-30 cm, many flowered. Flowers appearing after leaves. Pedicel filiform, ca. 3 cm. Calyx campanulate, ca. 1 1.5 mm; teeth truncate. Corolla white; lobes spatulate, ca. 2 mm. Stamens longer than corolla lobes. Samara red to brown, long spatulate, 2-4 cm 3.5-4.5 mm; wing decurrent to upper part of nutlet. Fl. Apr-May, fr. Jul-Sep.
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