Shrubs to 1 m tall. Branches grayish brown; current-year branchlets grayish brown to bright gray. Leaves digitate, 4-foliolate; petiole 4-12 mm and persistent on long branchlets, 1-3 mm and caducous on short branchlets; leaflet blades obovate, elliptic-obovate, or oblanceolate, 4-9 × 1.5-3 mm, glabrous, base cuneate, apex sharply acute. Flowers solitary or rarely 2 in a fascicle. Pedicel 1.2-1.4 cm, articulate near middle. Calyx tube tubular, 1.2-1.3 cm, base saccate. Corolla yellow but standard and keel purple at anthesis, 2.7-3.2 cm; standard obovate, 1.3-1.7 cm, base gradually narrowing into a claw, apex rounded to slightly emarginate; wings with claw nearly as long as limb, auricle acute; keel with claw longer than limb, auricle obtusely dentiform. Ovary glabrous. Legume linear, 2.5-5 cm, glabrous, apex acuminate. Fl. May-Jun, fr. Jul-Aug.
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