Shrubs to 2 m tall. Branches dark gray to purplish black. Leaves pinnate, 4-8-foliolate; petiole and rachis 1.5-4.5 cm, caducous; leaflet blades obovate, 7-15 × 5-9 mm, both surfaces glabrous or abaxially appressed pubescent, apex slightly emarginate to truncate. Flowers usually in pairs or very rarely 1-flowered on a peduncle. Pedicel 1-3.5 cm, articulate apically from middle. Calyx tube campanulate, 7-9 mm. Corolla yellow, 3-3.5 cm; standard broadly ovate, claw ca. 1 cm; wings with claw ca. 1/2 as long as limb, auricle linear and 2-3 mm; keel 3-5 mm shorter than wings, claw ca. 4/5 as long as limb. Ovary sericeous to glabrescent. Legume 4-5.5 cm. Fl. May, fr. Jul-Aug.
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