1. Stelmocrypton khasianum (Kurz) Baillon, Hist. Pl. 10: 300. 1890.
须药藤 xu yao teng
Pentanura khasiana Kurz, Forest Fl. Burma 2: 196. 1877.
Lianas to 10 m. Branchlets lenticellate, pubescent when young. Petiole ca. 5 mm; leaf blade reddish, oblong-elliptic to elliptic-ovate, 7-17 × 2.5-8 cm, somewhat leathery, glabrous, base cuneate, apex acute or short acuminate; lateral veins ca. 7 pairs, tertiary veins finely reticulate. Inflorescences shorter than leaves, 4- or 5-flowered; peduncle ca. 5 mm. Pedicel ca. 2 mm. Sepals broadly ovate, glabrous. Corolla yellow-green, ca. 6 mm wide, pubescent; lobes ovate. Corona lobes ovate. Follicles oblong-elliptic, 5-9 × ca. 2 cm, glabrous. Seeds ovate; coma ca. 3 cm. Fl. May-Sep, fr. Oct-Dec.
Bushland, forests. Guangxi, Guizhou, Yunnan [India, Myanmar]
All parts are used medicinally for bronchitis, cough, and epidemic influenza. The roots yield an aromatic oil.
The basionym is sometimes given as Periploca khasiana Bentham, but this name was never validated.