Perennial erect herb or undershrub, c. 30-60 cm tall, branches puberulous and dotted with yellow glands. Stipules free lateral, c. 2.5 mm long, caducous. Leaf palmately trifoliolate, rarely pinnately 5-foliolate, petiole c. 6-14 mm long, petiolule up to 1 mm, lamina c. 5-21 mm long, c. 3.5-17 mm broad, obovate, emarginate, glabrous above, puberulous below, glandular punctate on both sides. Inflorescence a peduncled axillary raceme; peduncle c. 17-45 mm long. Bract c. 1.5 mm long, ciliate at the margin, caducous. Pedicel c. 1 mm long, glandular punctate. Calyx c. 3 mm long, glandular punctate, teeth c. 1.5 mm long. Corolla white. Vexillum c. 5-6 mm long. Wing c. 4.5-5 mm long. Keel 4.0-4.5 mm long. Fruit c. 15-23 mm long, c. 5-8 mm broad, covered with hard spiny tubercles, 2-6-seeded.