Herbs, perennial, 30-45 cm tall. Stems numerous, erect. Stipules lanceolate, 5-7 mm, connate. Leaves 8-11 cm, 17-23-foliolate; leaflet blades oblong to ovate-elliptic, 10-15 × 6-8 mm, abaxially pubescent along veins, adaxially glabrous. Racemes somewhat dense, with many flowers; bracts ca. 4 mm; peduncle longer than leaves. Pedicel 5-6 mm. Calyx campanulate, 7-9 mm, pilose; teeth lanceolate, unequal, most abaxial tooth ca. 5 mm and ± as long as tube, adaxial 2 teeth ca. 4 mm. Corolla purple; standard obovate, 1.6-1.8 cm; wings shorter than standard; keel ± as long as standard. Ovary glabrous. Legume with 1 or 2 articles; articles obliquely obovoid, 1.5-2 × 0.8-1 cm, compressed, glabrous, margin entire, apex acute. Fl. Jul-Aug, fr. Aug-Sep.
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