Stem moderately hairy, particularly in upper parts, glabrous and woody toward base. Lvs ± glabrous or sparsely hairy; leaflets deltoid to ovate-deltoid, acute to acuminate, entire, 25-55 mm long; stipules ovate-triangular, usually reflexed, (2)-4-7 mm long; stipels lanceolate, 2-5 mm long. Infl. > lvs, c. 5-20-flowered, with many bracteoles; pedicels < fls. Calyx ± glabrous, but teeth ciliate; calyx teeth < tube, broadly ovate-triangular. Corolla white, or lavender and white, or pink to reddish purple, 10-15 mm long; keel curved through 90°. Pod glabrous, boat-shaped and slightly curved, 3-5-seeded, (25)-30-40-(45) mm long; seeds brown, oblong-ellipsoid, c. 4 mm long.