Shrubs 20-100 cm tall. Branches greenish brown to dark brown. Leaves digitate, 4-foliolate; petiole 5-7 mm, persistent; leaflet blades narrowly oblanceolate, 5-13 × 0.5-3 mm, glabrous, base cuneate, apex acute to slightly acuminate. Flowers solitary. Pedicel 4-5 mm, articulate basally. Calyx tube campanulate, 5-6 × ca. 4 mm. Corolla yellow, ca. 1.3 cm or 1.6-2 cm; standard broadly obovate, claw short, apex emarginate; wings oblong, claw slightly shorter than 1/2 of limb, auricle linear and nearly as long as claw; keel with claw slightly longer than 1/2 of limb, auricle inconspicuous. Ovary glabrous. Legume cylindric, 3-4 cm, glabrous. Fl. May, fr. Sep.
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