西藏吊灯花 xi zang diao deng hua

Ceropegia tsaiana Tsiang.

Rootstock a cluster of fusiform roots. Stems herbaceous, twining to 1 m, glabrescent. Petiole 3-4.5 cm, villous; leaf blade ovate or rarely oblong, 4-15 × 1-6 cm, membranous, adaxially villous, base rounded, apex acuminate; lateral veins ca. 5 pairs. Inflorescences shorter than leaves, ca. 8-flowered; peduncle ca. 2.5 cm, glabrescent. Pedicel ca. 1 cm, puberulent. Sepals lanceolate, ca. 1.5 × 0.5 cm. Corolla yellow, 5-5.5 cm; tube 3-3.5 cm, base slightly inflated, throat 3-5 mm in diam., narrower than base; lobes linear, 2-2.5 cm, basal ca. 1 cm orange-yellow, wider and strongly revolute, apical part ± subulate, purple. Outer corona obscurely 5-lobed, setose; inner lobes linear, much longer. Follicles narrowly fusiform, ca. 13 cm × 2 mm. Seeds lanceolate, ca. 10 × 1 mm; coma ca. 3.5 cm. Fl. Jul-Sep. 2n = 20.

Mixed woods; 1500-3200 m. Guizhou, Sichuan, Xizang, Yunnan [Bhutan, India, Myanmar, Nepal].