Erect shrub, 1.0-1.5 m. Leaves 3-foliolate, leaflets subterete, needle-like, slightly incurved, glabrous or sparsely hairy. Flowers in dense heads, yellow, often with purplish shades on back of standard and keel, wings glabrous, keel tip slightly pointed, glabrous, calyx white-hairy, upper two lobes broader than lower three lobes.