Monoecious, deciduous tree to 20 m high with smooth grey bark. Shoots green, glabrous. Buds large; inner scales to 5 cm long, pinkish. Petiole slender, to c. 15 cm long, usually reddish. Lamina simple, 5-lobed to c. 1/2 way on mature trees, mostly 8-14 × 10-20 cm, glaucescent or sometimes green below, becoming glabrous or with hairs confined to main vein axils below; lobes ovate, coarsely and irregularly crenate-serrate or lobulate; lf base subcordate or cordate. Panicles 5-15 cm long (including main stem), pendulous, appearing with the lvs; pedicels glabrous or hairy. Fls dense, numerous; sepals and petals 2-4 mm long, oblong, green. Stamens (6)-8-(10), exserted; filaments hairy towards base; anthers c. 1 mm long. Ovary white-villous. Samara wings 2-4 cm long, often reddish, usually spreading at a broadly obtuse angle, sometimes slightly incurved. Seed 0.5-1 cm long.