北野豌豆 bei ye wan dou

Orobus ramuliflorus Maximowicz, Prim. Fl. Amur. 83. 1859; ?O. baicalensis (Turczaninow ex Maximowicz) Stanke­vicz & Roskov; O. venosus Willdenow ex Link var. albiflorus Turczaninow; ?O. venosus var. baicalensis Turczaninow ex Maximowicz; ?O. venosus var. latifolius Turczaninow; O. venosus var. ramuliflorus (Maximowicz) Stankevicz; ?Vicia baicalensis (Turczaninow ex Maximowicz) B. Fedtschenko; V. ramuliflora f. abbreviata P. Y. Fu & Y. A. Chen; ?V. ramuliflora f. baicalensis (Turczaninow ex Maximowicz) P. Y. Fu & Y. A. Chen; V. venosa (Willdenow ex Link) Maximowicz var. albi­flora (Turczaninow) Turczaninow; ?V. venosa var. baicalensis (Turczaninow ex Maximowicz) Turczaninow; ?V. venosa var. latifolia (Turczaninow) Turczaninow.

Herbs perennial, 40-100 cm tall. Stem puberulent or gla­brescent. Leaves paripinnate, 5-8 cm; stipules semihastate, obliquely ovate, or oblong, 8-12(-16) × 10-13 mm, margin entire or toothed at base; leaflets (2 or)3(or 4)-paired, lanceolate or ovate-lanceolate, 25-80 × 10-30 mm, abaxially hairy along midrib, apex acuminate or long caudate; tendril absent, replaced by a mucro. Raceme usually 2- or 3-branched, 4-5 cm, shorter than leaf (rarely caespitose or capitate on a much-reduced pe­duncle), sparsely 4-9-flowered. Calyx obliquely campanulate. Corolla blue, blue-purple, or purple-red, rarely white; standard oblong or long obovate, constricted at middle, 11-14(-18) mm, subequaling wings and keel, apex retuse. Ovary shortly stalked, linear; ovules 5 or 6. Legume oblong-rhomboid, 25-50 × 5-7 mm, both ends acuminate. Seeds 1-4, elliptic. Fl. and fr. Jun-Sep. 2n = 12, 14.

Forests, forest margins, bush woods, among shrubs, hill slopes, grasslands, meadows, along rivers, weed communities; 200-1600 m. Anhui, Beijing, Heilongjiang, Jilin, Liaoning, Nei Mongol, Shandong [Japan, Korea, Mongolia, Russia (Far East, E Siberia)].