Herbs perennial, erect, 50-80 cm tall. Leaves paripinnate; stipules lanceolate or semihastate, 5-8 mm, margin 1-or 2-toothed proximally; leaflets 7-12-paired, linear to lanceolate, 20-35(-40) × 1.5-4(-6) mm, appressed hairy, apex obtuse or acute; lateral veins dense; tendril branched, 1-3 cm. Raceme subequaling leaf, densely 10-20-flowered. Calyx campanulate; lower tooth longer. Corolla purple-red, 12-15 mm; standard longer than wings and keel. Legume rhomboid or oblong, 20-25 × ca. 5 mm. Seeds 3-6. Fl. and fr. Mar-Jul. 2n = 14.
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