Lianas to 6 m, yellowish pubescent. Petiole 2.5-3.5 cm; leaf blade ovate, 5-11 × 4-8 cm, pilose, base cordate, apex short acuminate; basal veins 5-7, lateral veins ca. 3 pairs. Cymes umbel-like, to 6 cm, 6-15-flowered. Pedicel to 1.1 cm. Sepals ovate. Corolla yellowish green, short campanulate, ca. 2.5 mm; tube ca. as long as lobes, throat pubescent; lobes ovate, glabrous. Corona lobes flattened, entire, shorter than anthers. Anther appendages rounded; pollinia oblong, retina-culum longer than pollinia. Ovaries glabrous. Fl. May.

* Humid forests along valleys. Hainan.