Vines climbing. Stem branched, woody. Petiole 0.5--2 cm, narrowly winged for 1/4--1/3 its length; tendrils well developed. Leaf blade lanceolate-elliptic to lanceolate-ovate, 5--13 × 1.5--7 cm. Peduncle 2--10 cm. Umbels of both sexes 10--30-flowered, base 1.5--2 mm in diam.; pedicels 1--2 cm. Male flowers: perianth suboblong or subovoid, 3--7(--10) × 2--4 mm; stamens 9--12, 1--2.5 mm; filaments connate throughout, forming a short column ca. 1 mm; anthers elliptic, ca. 1 mm. Female flowers: perianth broadly ellipsoid, 2.8--3 × 2--2.5 mm; ovary ca. 2.5 mm; staminodes 3--6, filiform. Berries suboblate-globose, ca. 9 mm in diam. Fl. and fr. Nov.

Dense forests; 100--1800 m. S Yunnan [India, Laos, Thailand].