Lianas. Stems slender, to 3 m, pubescent. Petiole 1.2-4 cm; leaf blade broadly ovate, 6.5-15 × 3.5-9 cm, thin papery, base rounded, apex obtuse and mucronate; lateral veins 5-7 pairs, flattened. Inflorescences ca. as long as petiole; rachis simple, zigzag; cymules umbel-like, many flowered. Pedicel 4-8 mm, slender. Sepals oblong-ovate, ca. 1.5 × 0.8 mm; glands absent. Corolla greenish white, rotate, ca. 5 mm in diam.; tube shorter than lobes; lobes broadly ovate, ca. 3.5 × 2.5 mm, sparsely pubescent outside. Corona lobes subglobose, apex rounded or truncate and reaching base of anthers. Anther appendages as long as stigma head; pollinia subglobose, pendulous. Ovaries glabrous. Stigma head elevated, apex 2-cleft. Fl. Jun.

* Montane forests; ca. 1100 m. S Yunnan.