Vincetoxicum rockii (M. G. Gilbert & P. T. Li) S. Liede

Stems erect, to 30 cm, branched, pubescent. Leaves opposite; petiole 5-11 mm; leaf blade ovate, ca. 5 × 3 cm, abaxially densely puberulent on veins, adaxially sparsely pubescent, base rounded to broadly cuneate, apex acuminate; lateral veins 3 or 4 pairs. Inflorescences up to 7-flowered, slender, often forked with umbel-like clusters of flowers, to 3.6 cm; peduncle ca. 1.8 cm. Pedicel ca. 6 mm. Sepals lanceolate, ca. 2.2 × 0.5 mm. Corolla dark red; tube ca. 2 mm; lobes erect, ca. 4 × 1.5 mm, triangular-acuminate, glabrous outside, throat with woolly hairs, tube and lobes glabrous, apex blunt. Corona lobes almost free, ovate, higher than gynostegium, apex rounded, adnate to anther, without internal appendages. Fruit not seen.

Sichuan.

* Alpine meadows; ca. 3300 m.