Marsdenia sinensis Hemsl.

A decoction of all parts is used to detoxify viper bites and to treat pain, traumatic injury, and swelling.

Lianas to 10 m, finely yellowish tomentose. Stems lenticellate, glabrescent, hollow when dry. Petiole 2.5-7.5 cm; leaf blade ovate-cordate to ovate-oblong, 7-17 × 4-10 cm, thick papery, base cordate, apex short acuminate; lateral veins 5 or 6 pairs. Inflorescences dichasial, 3-13 cm, 10-55-flowered; peduncle 2-4.5 cm. Pedicel 3-5 mm. Sepals ovate or elliptic, ca. 3 × 2 mm. Corolla exterior yellow or rose and puberulent on lobes only, otherwise glabrous, interior yellow-ish or yellow-white and densely tomentose, subcampanulate; tube ca. 2.5(-7) mm; lobes ovate, 2-3 × 2-3 mm, spreading and recurved, apex rounded. Corona lobes ovoid-lanceolate, fleshy, shorter than anthers. Pollinia curved cylindric. Stigma head conical, apex 2-cleft, exserted from corolla tube. Follicles fusiform, 9-13 × 2-3 cm, rusty tomentose. Seeds ovate, 6-13 × 5-8 mm, margin membranous; coma ca. 3.5 cm. Fl. Apr-Jul, fr. Aug-Nov.

Fujian, Guangdong, Guangxi, Guizhou, Hubei, Hunan, Jiangxi, Sichuan, Yunnan, Zhejiang

Thickets, open woods, along humid valleys; 0-800 m.

Marsdenia yaungpienensis Tsiang & P. T. Li.

Dregea sinensis is a species of plant in the family Apocynaceae that is native to China.