Stems erect, greenish yellow to dark brown. Young branches longitudinally ridged when dry, densely appressed gray-whitish villous; bud scales triangular, apex acute to tapering, persistent. Leaves 1.2-3 cm; stipules triangular, 1-2 mm, appressed gray-white villous, persistent; petiole and rachis appressed gray-white villous, grooved above; leaflets 7-19, sessile, 1-2.7 × 0.2-0.35 cm, straight to curved, densely appressed adnate gray-whitish pubescent, becoming glabrate adaxially, lateral veins inconspicuous, margin entire, apex acute or blunt. Flowers 3-7, clustered at end of branchlets; bracts persistent, ovate-triangular, 3-5 mm, appressed gray-whitish villous abaxially, glabrous adaxially, apex acute; pedicels 5-7 mm, appressed gray-whitish pubescent; bractlets 2, acicular, 2-3 mm. Calyx campanulate, 8-9 mm; teeth 1-2 mm, appressed gray-whitish pubescent. Corolla yellow; standard obovate to broadly ovate, 1.6-1.8 × 1.3-1.5 cm, apex emarginate; wings oblong, 11-12 × 4-5 mm, claw 7.5-8 mm; keel boat-shaped, 11-12 mm, claw 7.5-8 mm. Stamen filaments 1.4-1.8 cm. Ovary densely appressed villous; carpopodium 4-6 mm; ovules 6-8. Legumes linear-oblong, 5.5-9 × 0.8-1.2 cm, apex beaked; stalk 6-8 mm, densely appressed gray-whitish villous; calyx persistent; segments brittle, sparsely appressed pubescent. Seeds 3-7; funicle slender, 0.8-1 mm.
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