Shrubs or shrublets. Leaves pinnately 3-foliolate; stipules narrowly triangular or rarely triangular to deltoid-ovate, persistent; stipels nearly always absent, or rarely always present, linear; leaflets entire. Inflorescences axillary, racemose, rarely umbellate or spicate, sometimes terminal panicle composed of several upper racemes with reduced subtending leaves, 1-flowered per bract; bracts persistent or caducous. Pedicels articulate; bracteoles 2, usually caducous before anthesis. Calyx campanulate, 4-lobed; lower lobe narrower and longer than upper and lateral ones, upper lobe minutely 2-toothed at apex. Corolla violet to pinkish white or rarely yellow; standard shortly clawed at base; wings auriculate and clawed at base; keel incurved at ca. right angle, acute at apex, auriculate, clawed at base. Stamens monadelphous; vexillary stamen connate to staminal tube for 2/3-4/5 of its length, rarely almost diadelphous. Pistil minutely stipitate; ovary 1-ovuled, superior; style filiform, incurved; stigma terminal, small, ciliate with minute hairs. Legumes compressed, lenticular, indehiscent, 1-seeded. Seeds reniform, rim-arillate with ringlike margin around hilum.
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