Shrubs, 1-2 m tall. Young branches sparsely shortly appressed hairy. Petiole 1.6-5.1 cm, glabrous or sparsely shortly appressed hairy; stipels present at top of petioles, linear, 1-3 mm, sometimes also present at top of rachis; leaflets narrowly ovate to ovate or narrowly oblong to oblong, terminal one 1.8-9 × 0.3-3 cm, abaxially glabrous or sparsely shortly appressed hairy, adaxially glabrous, base obtuse or rounded, apex retuse and mucronulate. Racemes 1.5-15 cm, sometimes paniculate at apex; rachis hairy. Pedicels 2.5-14 mm, hairy. Calyx ± densely appressed or ascending shortly hairy; tube 1.5-2.7 mm; lobes narrowly triangular, 1.2-2 mm. Corolla purple; standard elliptic, 9.5-10.5 mm, apex obtuse; wings 8.5-10.5 mm, clawed at base; keel incurved, 12.5-15.5 mm, clawed at base. Ovary 2.5-3 mm; style incurved, 7.5-9 mm. Legume obliquely oblong, 8-12 × 4-5 mm, lateral surface glabrous, apex obtuse. Seeds reddish brown, obliquely oblong, 3.5-4.5 × 2-2.7 mm.
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