Vines climbing. Stem branched, to 7 m, woody, scarcely prickly. Petiole 5--10(--20) mm, winged; wings 3--5 × 1--2 mm; abscission zone just above winged portion; tendrils partly present. Leaf blade abaxially glaucous, elliptic to ovate, 4--7(--12) × 2.5--4(--6) cm. Inflorescence borne in axil of young leaf on new branchlets, of 1 umbel, basally not prophyllate; peduncle 0.5--3 cm; umbels of both sexes 3--13-flowered, base usually slightly thickened, sometimes elongate; bracteoles several, persistent. Male flowers: tepals yellowish green, 3.5--4.5 × 1.2--2 mm. Female flowers: tepals subequaling male ones; staminodes 6. Berries red, globose, 7--8 mm in diam., white powdery. Fl. Apr--May, fr. Sep--Oct.

* Forests, thickets, shaded places on slopes; 900--2200 m. Guangxi, Guizhou, Hubei, Hunan, Sichuan.