Lianas. Stems glabrescent. Petiole ca. 1.5 cm; leaf blade ovate, 3.5-9 × 2.3-5.5 cm, stiffly papery, adaxially glabrous, abaxially uniformly pubescent with hairs having papillalike bases and strongly hooked tips, base cordate with narrow sinus, apex acute, apiculate. Cymes shorter than leaves, cymules densely racemelike; peduncle to 2 cm, rachis zigzag, sometimes absent. Pedicel to 6 mm. Sepals ca. 1.7 × 0.7 mm, oblong-lanceolate, subglabrous except for a few hooked hairs, apex acute. Corolla green, 3.5-5 mm; tube ca. 0.5 mm; lobes ovate to ovate-oblong, ca. 3.5 × 1.3 mm. Corona lobes ovate, ca. 0.5 × 0.2 mm, pouched, apex obtuse, covering base of anthers. Anther appendages rounded; pollinia globose, horizontal. Stigma head flat, 5-angled, depressed in center. Follicles linear-lanceolate in outline, ca. 5 cm × 6 mm, apex acuminate. Fl. Aug-Sep.

* ca. 400 m. Hainan (Poting).