Tetrastigma sichouense C. L. Li

Lianas, woody. Stem flat. Branchlets slightly flat or terete; tendrils unbranched. Leaves palmately 5-foliolate; petiole 5-20 cm; petiolules 1.5-5 cm, central petiolule longer than lateral petiolules; leaflets obovate-elliptic or obovate-oblong, 6-20 × 3.5-10 cm, lateral veins 6-8 pairs, veinlets raised abaxially, inconspicuous adaxially, base cuneate or broadly so, base of lateral leaflets asymmetric and subrounded, margin (6-)8-13-toothed on each side, apex caudate-acuminate or cuspidate. Inflorescence umbelliform, axillary, with nodes and bracts; peduncle 2-4 cm, densely ferruginous pubescent. Pedicel 3-4 mm, densely pubescent. Buds ovoid-elliptic, 3-4 mm, apex rounded. Calyx shallow and saucer-shaped, papillose, margin undulate. Petals elliptic, 2.5-3.5 mm, apex galeate, papillose. Filaments slender; anthers abortive in female flowers. Disk inconspicuous in female flower. Ovary coniform, papillose or nearly glabrous; stigma 4-lobed. Berry spheroid, 2-3 cm in diam., 2- or 3-seeded. Seeds elliptic and flat, base and apex obtuse, ventral holes furrowed and nearly parallel from base to apex. Fl. Apr-May, fr. Jun-Nov.

Guizhou, Xizang, Yunnan [Vietnam].

Forests or shrublands in valleys; 500-2400 m.