Herbs dioecious. Roots with swollen, tuberous part ca. 5 × 1.2 cm. Stems ± climbing, to 1 m, slightly angled when young; branches angled, slightly cartilaginous denticulate. Cladodes in fascicles of 3--7, falcate, 3--6 × ca. 0.6 mm, flat or slightly 3-angled. Leaf spur not spinescent. Inflorescences developing after cladodes, axillary. Flowers of both sexes solitary or paired, subequal; pedicel 1.5--2 mm, articulate at middle. Male flowers: perianth yellowish green, campanulate, 3--4 mm; stamens unequal; filaments adnate to perianth segments for ca. 1/2 their length. Berry ca. 5 mm in diam. Fl. Jul--Aug, fr. Aug. 2 n = 20*.

* Forests, thickets; 800--1700 m. S Yunnan.