四棱白粉藤 si leng bai fen teng

Lianas, woody. Branchlets nearly terete, upper part nearly square in cross-section, longitudinal ridges inconspicuous, glabrous; tendrils unbranched. Leaves simple; stipules caducous; petiole 0.8-3.5 cm, glabrous; leaf blade oblong or triangular-oblong, 6-19 × 2-7 cm, glabrous, basal veins 3, lateral veins 4-6 pairs, veinlets inconspicuous, base nearly truncate, margin with 5-11 fine teeth on each side, apex acuminate or mucronate. Compound dichasium terminal or leaf-opposed; peduncle 1-3 cm, glabrous or with sparse papillary hairs. Pedicel 3-10 cm, nearly glabrous. Buds conical-elliptic, 3-4 mm, apex obtuse. Calyx entire. Petals triangular-oblong, 2-3 mm, glabrous. Anthers ovoid-elliptic. Lower part of ovary adnate to disk; style conical; stigma slightly expanded. Berry 0.8-1.2 cm in diam., 1-seeded. Seed surface smooth, raphe raised, ventral holes very short at base. Fl. Sep-Oct, fr. Oct-Dec.

Forests, shrublands; 100-1300 m. Guangdong, Guangxi, Hainan, Yunnan [Laos, Vietnam].