Herbs, most parts pubescent. Stems twining to 4 m. Petiole 1-2 cm; leaf blade ovate or oblong-ovate, 5-9 × 2.2-6.7 cm, base subcordate to truncate, apex short acuminate; lateral veins 5 or 6 pairs. Inflorescences 4-7 cm; peduncle to 6 cm, puberulent. Pedicel 1.5-2.2 cm. Sepals linear to linear-lanceolate, 3-3.5 × 0.5-0.7 mm, glabrous; basal glands 5. Corolla glabrous; lobes ovate, 5-5.5 × ca. 3 mm, apex obtuse. Corona ca. 1/2 as long as gynostegium; lobes ovate-triangular, fleshy, with ovate, adaxial scale. Pollinia oblong-ovate. Stigma head discoid. Fl. Sep.

* Among shrubs along rivers; 2300 m. Sichuan (Muli)