Taproot straight. Stems short. Leaves imparipinnate, (1.5-) 2-20 cm, (5 or)7-19-foliolate; stipules persistent, triangular or ovate, joined at base; petiole white pilose; leaflets elliptic, oblong, narrowly obovate, or ovate (in spring) to lanceolate or linear (in autumn), (2-)5-25(-35) × (1-)1.5-7(-9) mm, both surfaces pilose or villous, adaxially rarely glabrous, apex variably obtuse, rounded, truncate, retuse, or acute, and with mucro. Umbels 2-4(-8)-flowered; rachis variable in length, ca. 1/2 as long to as long as leaves or longer; bracts narrowly triangular, lanceolate, or linear, sometimes subulate, 2-3 mm; pedicel 0.5-1(-3) mm; bracteoles linear, shorter than calyx. Calyx (4-)5-7 mm, white pilose; teeth lanceolate, upper 2 longer. Corolla purplish red, purple, pink, rose, or white; standard ovate, elliptic, or obovate to orbicular, (0.6-)1.3(-1.4) cm, apex retuse or acuminate; wings obovate, (0.6-)1.1 cm, auriculate or cuneate, claw (0.8-)3 mm; keel obovate or ovate, (4-)5.5(-7) mm, claw (1.8-)2.5 mm. Ovary elliptic or cylindric, densely pilose or villous; style glabrous, rolled inward. Legume cylindric or narrowly ovoid, (1-)1.5-2 cm × 3-4 mm, villous, pilose, or glabrescent, dehiscent. Seeds reniform, ca. 1.5 mm in diam. Fl. (Mar-)May, fr. (May-)Jun-Jul(-Nov).
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