Vincetoxicum verticillatum (Hemsl.) Kuntze

Herbs perennial, erect, to 60 cm tall, glabrescent except for stems and inflorescences. Stems simple or branched, puberulent on 1 side. Leaves opposite or in whorls of 3-6; petiole ca. 1 cm; leaf blade membranous, linear-lanceolate, 5-10(-17) × 0.7-1.5 cm, acuminate at both ends; lateral veins ca. 7 pairs, slightly elevated abaxially. Inflorescences subterminal, umbel-like or racemelike, 6-10-flowered; peduncle 0.2-1.5(-2.5) cm, pubescent along 1 side. Pedicel slender, ca. 1 cm. Sepals lanceolate, ca. 2 × 0.6 mm, acute, puberulent abaxially or glabrous, margin sometimes ciliate; basal glands few. Corolla pale yellow, white, or dark red, rotate, glabrous; tube ca. 1 mm; lobes ovate-oblong, 3-5.5 × 2-2.5 mm, acute. Corona lobes triangular, fleshy, adnate to anthers, joined laterally to form a thin tube ca. as high. Anthers square to oblong, appendages acute; pollinia oblong. Stigma head discoid, 5-angled, depressed, entire. Follicles lanceolate in outline, ca. 5 × 1 cm, smooth. Fl. Apr-Jul, fr. Jul-Aug.

Guangxi, Guizhou, Hubei, Sichuan, Yunnan.

* Valleys, moist sandy tracts, along ditches; 500-1000 m.

Cynanchum leveilleanum Schlechter ex H. Léveillé; C. verticillatum var. arenicola Tsiang & Zhang; Vincetoxicum verticillatum (Hemsley) Kuntze; V. verticillatum var. arenicola (Tsiang & Zhang) C. Y. Wu & D. Z. Li.