Secamone lanceolata Blume; S. micrantha (Decaisne) Decaisne; Tylophora micrantha Decaisne.

Plants to 5 m, glabrous except for inflorescences. Branches pale gray. Petiole 2-5 mm; leaf blade elliptic, elliptic-oblong, or rarely ovate, 4-7 × 1.5-2.5 cm, papery, with translucent gland dots, base cuneate, apex caudate-acuminate; lateral veins inconspicuous. Cymes extra-axillary, to 6 cm, many flowered; peduncle flexuous, dichotomous, pubescent. Pedicel 2-4 mm, pubescent. Sepals ovate, pubescent. Corolla yellow or greenish yellow; lobes oblong, ca. 3 mm. Corona lobes falcate, shorter than stamens. Stigma head exserted from anthers. Follicles lanceolate in outline, 5-7 × ca. 1 cm, terete, glabrous. Seeds ovate-oblong, ca. 5 × 3 mm; coma ca. 3 cm. Fl. Jul-Aug, fr. Sep-Dec.

The roots are used as medicine for rheumatism and traumatic injury.

Bushland, open woods; 100-600 m. Guangdong, Guangxi, Hainan, Taiwan, Yunnan [Cambodia, Indonesia, Malaysia, Vietnam]