Trees or large shrubs, 2-6 m tall. Branches dark gray; branchlets green to yellowish brown. Stipules spinelike, 5-10 mm. Leaves pinnate, 8-16-foliolate; petiole and rachis 3-7 cm, caducous; leaflet blades oblong-obovate to elliptic, 1-2(-2.5) × 0.5-1(-1.3) cm, pubescent when young or only abaxially pubescent, base mostly rounded or rounded-cuneate, apex obtuse. Flowers solitary or to 5 in a fascicle. Pedicel 2-5 cm, articulate apically. Calyx tube often broadly campanulate, 6-8 mm. Corolla yellow, 1.6-2 cm; standard rhombic to broadly ovate, apex rounded-obtuse; wings with claw ca. 3/4 as long as limb, auricle spurlike and no longer than 1/3 length of claw; keel with claw slightly shorter than limb, auricle obtuse to deltoid. Ovary glabrous or appressed pubescent. Legume 3.5-6 cm, glabrous. Fl. May-Jun, fr. Aug-Sep. 2n = 16.
