Shrubs to 3 m tall. Old branches grayish brown; young branchlets brown. Leaves pinnate, 10-18-foliolate; petiole and rachis 2-5 cm, persistent on long branchlets, caducous on short branchlets; leaflet blades obovate-oblong to oblong, 5-9 × 3-3.5 mm, pubescent when young, apex obtuse. Flowers solitary or rarely in pairs on a peduncle. Pedicel 0.5-2 cm, articulate basally from middle. Calyx tube yellowish brown, tubular, 0.8-1.2 cm, base gibbous. Corolla yellow but standard sometimes purple; standard suborbicular to obovate, ca. 2.3 cm, apex emarginate or not; wings with claw slightly shorter than limb, auricles 2, basal auricle ± as long as claw, apical auricle dentiform or ca. 5 mm; keel with claw ± as long as limb, apex obtuse, auricle dentiform. Ovary densely pubescent. Legume cylindric, 2-4.5(-5) cm, outside appressed pubescent, inside brown tomentose. Fl. May-Jun, fr. Jul-Aug. 2n = 16*.
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