Herbs perennial, 20-80 cm tall. Stem suberect, climbing, much branched, puberulent or glabrescent. Leaves paripinnate; stipules semihastate, both surfaces with raised veins; leaflets 3-8-paired, oblong-lanceolate or elliptic, 6-18(-35) × 1-5 mm, abaxially pilose, adaxially glabrous, apex obtuse or acute, mucronate; lateral veins obvious; tendril present. Raceme obviously longer than leaf, 3-11-flowered. Calyx campanulate, unequally toothed, pilose or glabrescent. Corolla yellow, light yellow, or white; standard obovate, constricted at middle, subequaling wings and longer than keel, apex retuse. Ovary linear; ovules 1-5. Legume linear, 26-35 × 5-8 mm. Seeds 1-4. Fl. and fr. Jun-Aug. 2n = 12.
Home