Shrublets, 30-70 cm tall. Stems caespitose, erect. Stipules ovate-lanceolate, 4-6 mm, basally connate. Leaves 6-18 cm, 15-29-foliolate; leaflet blades broadly ovate to suborbicular, 5-8(-15) × 3-5(-8) mm, abaxially pubescent, adaxially glabrous. Racemes lax, with many flowers; peduncle conspicuously longer than leaves. Pedicel 1-2 mm; bracteoles ± as long as pedicel. Calyx obliquely campanulate, 5-6 mm, pubescent; tube split ca. 1/2 between adaxial teeth; teeth subulate, 1/4-1/3 as long as tube, most abaxial one ca. 2 × as long as others. Corolla purple, pinkish purple, or rarely white; standard broadly ovate, 1.7-2 cm; wings ca. 1/2 as long as standard; keel slightly shorter than wings. Ovary pubescent. Legume usually divided into 2 or 3 articles; articles ellipsoid to semiglobose, 3.5-4.5 × 3-4 mm, pubescent and prickly. Fl. Jun-Aug, fr. Aug-Sep.
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