Herbs perennial, 15-30 cm tall, sparsely to densely villous. Leaves usually imparipinnate, 1.5-4 cm; stipules digitate-hastate, divided nearly to middle into 5-7 narrowly triangular, unequal teeth; leaflets 2-4-paired and usually also 1 terminal, linear, 10-20 × 1-2 mm, apex acute, mucronate; tendril absent. Raceme 4-8 cm, longer than leaf, 2-4-flowered. Calyx tube ca. 5 mm; teeth ca. 2 mm. Corolla purple, with dark patch on abaxial surface of standard and pale yellow wings, 1.8-2 cm; standard longer than wings and keel. Legume light brown, narrowly oblanceolate, gradually narrowed toward base, abruptly narrowed at apex, 25-40 × 6-10 mm, glabrous; persistent style curved, 5-7 mm. Seeds 2-4. Fl. Apr-May, fr. May-Jun.
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