Shrubs to 1 m tall. Bark greenish brown to grayish brown. Leaves digitate, 4-foliolate; petiole 5-10 mm, caducous or persistent; leaflet blades obovate, 1-2.5 × 0.4-1.2 cm, glabrous, apex obtuse to emarginate. Flowers solitary. Pedicel 0.8-1.9 cm, articulate basally to apically. Calyx tube purplish red, tubular, 7-9 mm. Corolla yellow, purplish red, or pinkish, later reddish, 2-2.5 cm; standard oblong-obovate, apex emarginate; wings oblong-linear, claw slightly shorter than limb, auricle shortly dentiform; keel with claw equal to limb, auricle inconspicuous. Ovary glabrous. Legume cylindric, 3-6 cm, apex acuminate. Fl. May-Jun, fr. Jun-Jul. 2n = 16*.
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