柳叶野豌豆 liu ye ye wan dou

Orobus venosus Willdenow ex Link, Enum. Hort. Berol. Alt. 2: 236. 1822; O. venosus var. willdenowianus Turczani­now; Vicia venosa var. willdenowiana (Turczaninow) Maxim­owicz.

Herbs perennial, 40-80 cm tall. Stem erect, pilose at first, later glabrescent. Leaves paripinnate; stipules semihastate, 10-15 × 3-5 mm, margin toothed, apex long acuminate; leaflets 2-6-paired, linear to narrowly lanceolate, those on upper part of stem often broader (sometimes to lanceolate) than those on lower part, 40-65(-90) × 3-13(-25) mm, abaxially slightly hairy, apex acuminate or long caudate, mucronate; tendril ab­sent, replaced by a mucro. Raceme 2- or 3-branched, 3-7 cm, subequaling or longer than leaf, 4-9-flowered. Calyx campan­ulate. Corolla red, purple-red or blue; standard obovate-oblong, ca. 13 mm, longer than wings and keel, apex retuse. Ovary gla­brous; ovules 5 or 6. Legume oblong, flat, 25-33 mm, both ends acuminate. Seeds 3-6. Fl. Jun-Sep, fr. Jul-Sep. 2n = 12, 24.

Mixed forests, grasslands on hill slopes, meadows; 600-1800 m. Hebei, Heilongjiang, Jilin, Nei Mongol [Japan, Korea, Mongolia, Rus­sia (Far East, E Siberia)].