Vines climbing, unarmed. Stem branched, woody; branches striate. Petiole usually curved, 2--4 cm, laterally compressed, abaxially keeled, narrowly winged for 1/2--2/3 its length; abscission zone distal; tendrils well developed. Leaf blade suboblong, oblong-lanceolate, or ovate-lanceolate, 6.5--18 × 3--6.5 cm. Male inflorescence of 1 umbel, basally prophyllate; peduncle 2--3.5 cm, proximally articulate, with 2 lanceolate bracts; umbel 4--7-flowered, base scarcely thickened; bracteoles caducous. Male flowers: outer tepals 7--8 × ca. 2 mm, inner ones ca. 7 × 1 mm; stamens subequaling tepals; anthers oblong. Female flowers unknown. Berries globose, 1.2--1.5 cm in diam.; carpopodium usually curved. Fr. Dec--Jan.

* Forests; near sea level to 1300 m. S Guangxi, SE Yunnan.