Cynanchum anthopotamicum Handel-Mazzetti, Symb. Sin. 7: 995. 1936.

Lianas woody, rhizomatous. Stem tips twining, to 1.5 m, densely to sparsely minutely hirsute. Petiole 3-5 mm; leaf blade lanceolate, 4-11 × 1-2 cm, papery, base broadly cuneate; lateral veins 12-16 pairs. Inflorescences axillary, racemelike; peduncle ca. 2.5 cm; bracteoles basal. Pedicel slender, 5-8 mm. Sepals triangular-lanceolate, ca. 1.5 mm, apex acuminate, often recurved. Corolla purple-brown, rotate; lobes triangular-lanceolate, 5-6 mm, recurved, glabrous. Corona short, ringlike; lobes globose-triangular, as long as anthers, back convex, apex acute; appendages ovate. Pollinia ellipsoid, erect. Fl. Jun.

* Montane forests; ca. 900 m. SW Guizhou.