Herbs perennial, 60-120 cm tall. Stem erect, few branched, pilose. Leaves paripinnate, 9-11 cm; stipules semihastate, rhomboid to lanceolate, bifid, 5-12 mm; leaflets usually 9-paired, linear-lanceolate, ovate-lanceolate, or oblong, 12-27 × 7-11 mm, apex rounded or acuminate, mucronate; lateral veins 9-13-paired, joined at margin; tendril 2-or 3-branched. Raceme obviously shorter than leaf, 6-10 cm, densely 10-20-flowered; bracts present. Calyx subcampanulate, unequally toothed, pilose. Corolla purple, purple-red, or light purple with some pink; standard oblong, ca. 14 × 5 mm, subequaling wings and longer than keel. Ovary linear, ca. 5 mm, glabrous; ovules ca. 6. Legume narrowly oblong, 20-25 mm, apex beaked. Seeds 3-6. Fl. and fr. Jun-Aug.
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