东方野豌豆 dong fang ye wan dou

Ervum amoenum (Fischer ex Seringe) Trautvetter var. pal­lidum Trautvetter; Vicia amurensis Oettingen var. pallida Kita­gawa; V. japonica var. comosa Boissier; V. japonica var. laxira­cemis Ohwi; V. japonica subsp. pallida Voroschilov; V. japonica var. pallida H. Hara; V. pallida Turczaninow (1842), not Hook­er & Arnott (1833); V. pallida Turczaninow var. japonica (A. Gray) Matsumura; V. woroschilovii N. S. Pavlova.

Herbs perennial, 60-120 cm tall. Stem climbing or trailing, yellow-white hairy at first, later glabrescent. Leaves paripinnate, 5-15 cm; stipules linear or linear-lanceolate, 5-7 × ca. 1 mm, margin toothed; leaflets 5-8-paired, not markedly discolorous, lanceolate-ovate to ovate or elliptic, rarely nar­rowly lanceolate-elliptic, 10-30 × 6-14 mm, abaxially puberu­lent, adaxially glabrous, apex obtuse and retuse, mucronate; lat­eral veins sparsely 7-9-paired; tendril 2- or 3-branched. Ra­ceme subequaling or slightly longer than leaf, 7-15-flowered, villous; bracts absent. Calyx campanulate, unequally toothed, villous. Corolla blue or purple; standard oblong, 10-14 mm, subequaling wings and longer than keel, apex retuse. Ovary linear, 6-12 mm; ovules 2-7. Legume oblong-rhomboid, 15-25 mm, apex beaked. Seeds 1-3, oblate-spheroid. Fl. and fr. Jun-Sep. 2n = 12, 14, 24.

Forest margins, hill slopes, valleys, meadows, riverbanks; 600-3700 m. Heilongjiang, Jilin, Liaoning, Nei Mongol, Shaanxi [Japan, Korea, Mongolia, Russia (Far East, E Siberia)].