大叶野豌豆 da ye ye wan dou

Ervum pseudo-orobus (Fischer & C. A. Meyer) Traut­vetter; Vicia pseudo-orobus f. albiflora (Nakai) P. Y. Fu & Y. A. Chen; V. pseudo-orobus var. albiflora Nakai; V. pseudo-orobus f. breviramea P. Y. Fu & Y. C. Teng; V. pseudo-orobus var. semistipulata Handel-Mazzetti.

Herbs perennial, 50-150(-200) cm tall. Stem erect or climbing, green or yellow with black-brown spots, puberulent when young, later glabrescent. Leaves paripinnate, 2-17 cm; stipules hastate, 8-15 mm, margin toothed; leaflets 2-5-paired, elliptic or lanceolate, often narrowly so, 20-60(-100) × 10-35 mm, membranous, abaxially pilose or glabrescent, adaxially glabrous, apex obtuse or acuminate, mucronate; lateral veins obvious; tendril well-developed, 2- or 3-branched. Raceme unbranched, longer than leaf, 5-18 cm, rarely branched and very short, 15-30-flowered. Calyx obliquely campanulate, shortly toothed. Corolla blue-purple, purple, pink, pale yellow, or white, 10-15 mm; standard subequaling wings and keel. Ovary glabrous; ovules 2-6. Legume brown-yellow, oblong, flat, 20-35 × 6-8 mm. Seeds 2-6. Fl. Jun-Sep, fr. Jul-Oct. 2n = 12, 14.

Forests, forest margins, thickets, scrub, hill slopes, sunny slopes, valleys, ravines, meadows, pastures, dry limestone areas, fields; 400-3000 m. Anhui, Gansu, Guizhou, Hebei, Heilongjiang, Henan, Hubei, Hunan, Jiangsu, Jilin, Liaoning, Nei Mongol, Shaanxi, Shandong, Shan­xi, Sichuan, Yunnan [Japan, Korea, Mongolia, Russia (Far East, E Si­beria)].