Description from Flora of China
Trees 8-10 m tall, andromonoecious. Bark yellowish brown or dark brown, smooth. Branchlets slender, glabrous. Leaves subleathery; petiole 3-5 cm, sturdy, glabrous; leaf blade 9-11 × 11-13 cm, glabrous or glabrescent except for tufts of yellowish hairs at vein axils, base truncate or subcordate, usually 7-lobed, rarely 5-lobed; lobes oblong-ovate or ovate, margin sparsely crenate, apex acute. Inflorescence terminal, paniculate, 5-7 cm, many flowered. Sepals 5, purple, ovate-oblong, apex obtuse. Petals 5, white, oblong or ovate. Stamens 8. Disk thick, extrastaminal, slightly pubescent. Ovary white pilose, rudimentary in staminate flowers; style glabrous; stigmas spreading or recurved. Fruit yellowish, glabrous; nutlets globose, strongly convex, ca. 5 mm in diam.; wing including nutlet 2.5-3 × 1-1.5 cm, wings spreading obtusely, upper part recurved. Fl. Apr- May, fr. Jul-Sep.
● Montane forests, usually in valleys; 1300-2300 m. W Guangxi, SE Yunnan.