Lianas. Stems to 2 m, gray-green, young branches pubescent along 1 side, glabrescent. Petiole 0.8-2 cm, adaxially pubescent; leaf blade ovate or ovate-oblong, 3-5.5 × 1-3.5 cm, glabrous except for adaxially puberulent midvein, abaxially very minutely dense papillate, base rounded, apex acuminate; lateral veins 4 or 5 pairs. Inflorescences longer than leaves, umbel-like; peduncle slender, glabrous; rachis 2- or 3-forked. Pedicel 4-6 mm. Sepals oblong-ovate, ca. 1 × 0.5 mm, glabrous; glands present. Corolla greenish, rotate, ca. 4 mm in diam.; tube short; lobes oblong-ovate, ca. 1.5 × 1 mm, glabrous. Corona lobes ovate, pouched, apex acute and reaching base of anthers; pollinia subglobose, horizontal. Ovaries glabrous. Stigma head discoid, apex convex. Fl. May.

* Bushland, open woods. NW Guangxi, S Yunnan.