Cynanchum gracillimum Wallich ex Wight, Contr. Bot. India 57. 1834.

Lianas to 4 m. Petiole 1.5-4 cm; leaf blade ovate or oblong-ovate, 3.5-6 × 2.5-4.5 cm, membranous, glabrous, base cordate, apex acuminate; lateral veins faint, 5-7 pairs. Cymes shorter than leaves; pubescent except for corolla. Corolla white, glabrous, ca. 4 mm; tube (2-)3 mm; lobes oblong, 1(-2) mm, spreading. Follicles elliptic-oblong or oblong-lanceolate, ca. 4.5 × 1.5 cm. Seeds suborbicular; coma ca. 2 cm. Fl. autumn.

Thickets, forests along valleys; 500-1000 m. Guangxi, Guizhou, Yunnan [Myanmar].