Lianas, woody. Branchlets terete, conspicuously tuberculate when old, glabrous; tendrils bifurcate. Leaves pedately 5-foliolate; petiole 3-14 cm; central petiolule 1-3 cm, petiolules of lateral leaflet complex 0.5-1.8 cm, lateral petiolules 0.5-1.8 cm, glabrous; central leaflet obovate-elliptic, 4-17 × 3-8 cm, glabrous or pilose on midvein when young, lateral veins 7-19 pairs, veinlets inconspicuous, base cuneate, base of lateral leaflets asymmetric, margin with 7-16 denticles on each side, apex acute or mucronate. Inflorescence axillary or leaf-opposed on lateral branches, umbelliform; peduncle 3-8 cm, pubescent or glabrous. Pedicel 1-3 mm, papillose or glabrescent. Buds elliptic or obovoid-elliptic, 2-2.5 mm, apex rounded. Calyx shallow and saucer-shaped, glabrous, margin undulate. Petals elliptic, 1.8-2.3 mm, apex galeate, glabrous. Anthers yellow. Disk well developed in male flowers, 4-lobed, thin in female flowers. Ovary coniform, lower part of ovary adnate to disk; style inconspicuous; stigma 4-lobed. Berry globose, 8-10 mm in diam., 2-or 3-seeded. Seeds obovoid-triangular, base attenuate, apex retuse, ventral holes furrowed upward 1/3 from middle. Fl. Apr-May, fr. Jul-next May.
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A woody climber. The tendrils are divided. The leaves have 5 leaflets spread out like fingers on a hand. The central leaflets is narrowly oval and 4-17 cm long by 3-8 cm wide. The flowers are in the axils of leaves or on branches opposite the leaves. The fruit is round berry up to 1 cm across. There are 2 or 3 seeds.
It is a subtropical plant. In southern China it grows in forests on hillsides and valleys between 500-2,500 m above sea level. In Sikkim it grows between 1,500-2,300 m above sea level. In Yunnan.
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