Shrubs to 60 cm tall. Old branches greenish brown; current-year branchlets yellowish brown to reddish brown. Leaves pinnate on long branches and 4-8-foliolate, digitate on short branches and 4-foliolate; petiole and rachis 1.5-2 cm and persistent on long branchlets, 2-15 mm and persistent or caducous on short branchlets; leaflet blades linear-oblanceolate to obovate-oblong, 3-12 × 1-2.5 mm, abaxially pilose, adaxially glabrous, apex acute. Flowers solitary or to 4 in a fascicle. Pedicel very short, appressed pubescent or glabrous. Calyx tube tubular, 8-10 mm. Corolla yellow but standard sometimes reddish purple, 1.8-2.5 cm; standard broadly ovate to oblong-obovate; wings with claw ± as long as limb, auricle very small; keel with claw longer than limb. Ovary glabrous or sparsely to densely pubescent. Legume 1.5-2 cm, glabrous or pilose. Fl. May-Jun, fr. Jul-Sep. 2n = 16*, 32*.
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