Vines climbing. Stem and branches densely prickly; prickles slightly curved, sometimes forked. Petiole 1--2 cm, minutely verruculose-prickly, winged for 1/4--1/2 its length; abscission zone near middle; tendrils usually present. Leaf blade elliptic to ovate-elliptic, 8--15 × 3--7 cm. Inflorescence of 1 umbel, basally prophyllate; peduncle 1.5--2.5 cm, proximally articulate; umbels of both sexes densely many flowered, base slightly thickened. Male flowers: tepals greenish, ca. 5 × 0.8--1.5 mm; stamens 5--6 mm. Female flowers: tepals slightly smaller than male ones; staminodes 6. Berries globose, 8--10 mm in diam. Fl. Jan--Feb, fr. Nov--Dec.

* Forests; 1000--1300 m. SE Yunnan.