Tetrastigma yunnanense Gagnep.

Tetrastigma yunnanense var. glabrum W. T. Wang (Bull. Bot. Res., Harbin 6(4): 23. 1986), described from Yunnan, could not be treated here because no material was seen by the authors.

Lianas, semiwoody. Branchlets terete, with longitudinal ridges; tendrils digitately 4-9-branched. Leaves palmately 5-foliolate; stipules conspicuous, brown, oval, persistent; petiole 3-9(-11) cm; leaflets obovate-elliptic, rhombic-ovate, lanceolate, or obovate-lanceolate, 2-10 × 1-5 cm, lateral veins 6 or 7 pairs, veinlets inconspicuous, base cuneate, margin undulate and 6-8-toothed on each side, apex acuminate, or acute, rarely rounded. Compound umbel pseudoterminal, or leaf-opposed, rarely axillary, 2-8 cm. Pedicel 1.5-4 mm. Buds oval or obovoid, 2-3 mm, apex rounded. Calyx shallow and saucer-shaped, margin undulate. Petals oval or ovate-elliptic, 1.8-2.7 mm, apex rounded. Stamens with oval anthers, undeveloped in female flowers. Disk conspicuous in male flowers, thin in female flowers. Ovary coniform, lower part adnate to disk; style short; stigma expanded, 4-lobed. Berry spheroid, 8-10 mm in diam., 1- or 2-seeded. Seeds elliptic, flat, base rostrate, apex rounded. Fl. Apr-May, fr. Sep-Nov.

Xizang, Yunnan.

● Forests by rivers, shrublands on hillsides; 1200-2600 m.