Description from Flora of China
Ceropegia yunnanensis Schlechter & Handel-Mazzetti.
Stems herbaceous, twining to 1.5 m, pale gray, hollow when dry, sparsely villous. Petiole 5-10 mm, densely hirsute; leaf blade broadly ovate to ovate-oblong, 4-10 × 3-5 cm, membranous, adaxially sparsely hirsute, abaxially glabrescent or sparsely hirsute along midvein, base rounded to broadly cuneate, margin ciliate, apex acuminate; lateral veins ca. 6 pairs. Inflorescences umbel-like; peduncle 4-15 mm, hirsute. Pedicel 0.5-1.5 cm, glabrous or minutely pubescent abaxially. Sepals subulate-linear, ca. 5 mm, glabrous. Corolla mostly maroon or pink, 3-4 cm, glabrous outside; tube 1.5-2 cm, base slightly dilated, limb 2.5-3 mm wide above basal swelling widening to 6-10 mm at throat; lobes linear, ca. 1.5 cm, basal part pale, sparsely lanate, apical part sharply delineated, dark (?green), minutely pubesent. Outer corona lobes acutely 2-lobed, ciliate; inner lobes oblong, obtuse, ca. 3 × longer than outer. Fl. Apr-Aug.
Mixed woods, thickets along riversides; 0-2000 m. Guizhou, Sichuan, Xizang, Yunnan [Thailand].