Shrubs 30-60 cm tall. Branchlets yellowish green with brown stripes, puberulent when young. Leaves digitate, 4-foliolate; petiole 4-6 mm and persistent on long branchlets, absent on short branchlets; leaflet blades narrowly oblanceolate to linear-oblanceolate, 4-12 × 0.5-1.2 mm, dark green but abaxially tinged ± reddish, pubescent when young. Flowers solitary. Pedicel 0.8-1.5 cm, articulate at or near middle. Calyx tube tubular, 4-6 mm. Corolla yellow, 1.5-2 cm; standard ovate to obovate, claw 1/6-1/5 as long as limb; wings with claw ca. 1/3 as long as limb, auricle ca. 2/3 as long as claw; keel with claw slightly shorter than limb, auricle small, short, and obtuse. Ovary linear, ca. 1.5 cm, glabrous. Legume ca. 2.5 cm. Fl. May-Jun, fr. Jun-Jul.
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