Tylophora tsiangii (P. T. Li) M. G. Gilbert, W. D. Stevens & P. T. Li

Herbs, most parts hispid. Stems erect, to 40 cm tall. Leaves opposite; petiole 1-2 mm; leaf blade drying brownish, ovate, 1.5-3.5 × 1-2.5 cm, base rounded, apex acute; lateral veins 4 or 5 pairs. Inflorescences with several racemelike cymules along zigzag rachis; peduncle ca. 7 mm, to 4 cm in fruit. Pedicel 2-5 mm, ca. 1.1 cm in fruit. Sepals lanceolate, ca. 2.5 × 0.5 mm, densely hispid outside, glabrous inside. Corolla whitish, rotate; lobes lanceolate, ca. 2.5 × 1.5 mm, glabrous. Corona lobes elliptic, fleshy, apex acute, reaching middle of stamens, with minute, basal, adaxial scale. Stamens longer than pistil; anthers nearly square; pollinia ellipsoid. Stigma head discoid. Follicles paired, widely divergent, ca. 4.5 cm × 8 mm, puberulent. Seeds brown, ca. 7 × 4 mm; coma ca. 2 cm. Fl. Oct.

Guizhou [Vietnam].

Thickets; ca. 1300 m.

Cynanchum tsiangii P. T. Li, Bull. Bot. Res., Harbin 3(1): 103. 1983; Vincetoxicum tsiangii (P. T. Li) P. T. Li.