黑龙江野豌豆 hei long jiang ye wan dou

Vicia amurensis f. alba H. Ohashi & Tateishi; V. amurensis var. pratensis (Komarov) H. Hara; V. amurensis f. sanheensis Y. Q. Jiang & S. M. Fu; V. amurensis var. silvatica (Komarov) H. Hara; V. japonica A. Gray subsp. amurensis (Oettingen) Kita­mura; V. japonica var. pratensis Komarov; V. japonica var. silvatica Komarov; V. pallida Turczaninow var. pratensis (Komarov) Nakai; V. vaniotii H. Léveillé.

Herbs perennial, 50-100 cm tall, glabrescent. Stem climbing. Leaves subsessile, paripinnate, 5-15 cm; stipules semihastate, bifid, margin 3-5-toothed; leaflets 3-6-paired, ob­long-ovate to elliptic, 16-30 × 9-16 mm, puberulent at first, later glabrescent, apex retuse and entire; lateral veins dense; tendril 2- or 3-branched. Raceme subequaling leaf, densely 15-30-flowered. Calyx obliquely campanulate, unequally toothed. Corolla blue-purple or white, rarely purple; standard oblong or nearly obovate, ca. 10 × 6 mm, subequaling wings and longer than keel. Ovary glabrous; ovules 1-6. Legume rhomboid or suboblong, 15-25 mm. Seeds 1-5. Fl. Jun-Sep, fr. Aug-Sep. 2n = 12, 14.

Forests, forest margins, hill slopes, grasslands, meadows, sandy land along rivers, weed communities; 400-800 m. Beijing, Heilong­jiang, Jilin, Liaoning, Nei Mongol, Shanxi [Japan, Korea, Mongolia, Russia (Far East, E Siberia)].