Scandent shrubs or sometimes semiwoody vines, glabrous or tomentose; branchlets sometimes 4-6-angled. Leaves alternate, serrate, stipulate. Inflorescences axillary or terminal, thyrsoid. Flowers bisexual or unisexual (polygamous), 5-merous. Disk fleshy, cupuliform, 5-lobed, intrastaminal; anthers longitudinally dehiscent, introrse. Ovary 3-locular; ovules erect, 2 per locule. Samara 3-winged, chartaceous. Seed 1, trigonous.

One species: from NE Myanmar through China and Korea to Japan.

(Authors: Ma Jinshuang (马金双); A. Michele Funston)