Erect shrub up to ± 1.5 m in height. Branches green to brown, pilose to glabrescent. Stipules triangular to narrowly triangular, 2-4 mm long, 1-2 mm wide, pilose on adaxial surface, often with black hairs. Leaves imparipinnate, 30-80 mm long, 5-8 jugate; petiole 5-20 mm long; leaflets lanceolate to elliptic, subsessile, 6-20 mm long, 1-5 mm wide, apex markedly acuminate, base cuneate, pilose on abaxial surface, glabrous on adaxial. Inflorescence lax, axillary racemes, longer than the leaves, up to ± 250 mm long, with 6-13 flowers, rarely spine-tipped; pedicels 5-12 mm long; bracts narrowly ovate, 4 mm long, pubescent, often with black hairs, persistent; bracteoles present at base of calyx, 1.0-1.5 mm long, pubescent, often with black hairs, persistent. Flowers 8-14 mm long, pink or purple. Calyx ± 5-6 mm long, pubescent, often with black hairs, subequally 5-lobed, tube ± 3-4 mm long; lobes deltoid, ± 1.5-2.5 mm long, upper two shorter than the lower three, tips pubescent on inner surface. Standard 10-13 mm long, claw linear, 2-3 mm long; lamina broadly obovate, 8-10 mm long, 11-13 mm wide, emarginate, glabrous. Wings 10-1 long, claw 2-3 mm long; lamina oblong, ± as long as keel, 8-11 mm long, 3-4 mm wide, obtuse, glabrous, without sculpturing. Keel 10-12 mm long, claw 3-4 mm long; lamina boat-shaped, 7-9 mm long, 5-7 mm wide, obtuse, glabrous, pocket absent. Anthers monomorphic, basifixed, nine stamens fused for two-thirds of their length, vexillary stamen free but fused at the base with the other stamens. Pistil stipitate, glabrous, ovary narrowly elliptic, 7-9 mm long, ± 1 mm wide with ± 12-15 ovules; style ± 4-6 mm long, curved upwards, bearded along the upper surface of the style. Pods stipitate with stipe 10 mm long, obliquely elliptic to obliquely obovate, laterally compressed, 20-35 mm long, 8-11 mm wide, glabrous, ± 3-6-seeded, indehiscent. Seeds not seen.
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