蔓白前 man bai qian

Vincetoxicum volubile Maximowicz, Mem. Acad. Imp. Sci. Saint-Petersbourg Divers Savan 9: 195. 1858; Alexitoxicon volubile (Maximowicz) Pobedimova; Antitoxicum volubile (Maximowicz) Pobedimova.

Stems twining to 3 m, pubescent along 2 lines at base of internode, 1 line disappearing along the upper part of node. Leaves opposite; petiole ca. 1 cm; leaf blade oblong or oblong-lanceolate, 4-10(-15) × 1.2-3(-4.5) cm, papery, glabrescent or pubescent along veins, base truncate to shallowly cordate, margin ciliate, apex acuminate; lateral veins 7-10 pairs. Inflorescences umbel-like to short, lax, racemelike, to 6 cm; peduncle 0-3.5 cm, glabrous. Pedicel 1-1.7 cm, glabrous. Sepals lanceolate, 2-2.3 × 0.5-0.7 mm, ciliate. Corolla white, rotate; tube ca. 2 mm; lobes linear-lanceolate, 4-6 × 1.3-1.7 mm, glabrous outside, densely pubescent inside. Corona lobes ovate-triangular, apex acute. Pollinia ovoid. Stigma head depressed. Follicles lanceolate in outline, ca. 5 × 1 cm, glabrous. Fl. Jul-Sep, fr. Aug-Dec.

* Moist grasslands. Heilongjiang (Mishan and Yiehun) [Korea, E Russia].