Plants 10-25 cm tall. Stems sparsely to loosely covered with very short appressed hairs, soon glabrescent. Leaves 2-4 cm; stipules 2-4 mm, shortly ciliate at margin, lower ones shortly vaginate-connate behind stem, upper ones nearly free; petiole 0.5-2 cm, like rachis loosely covered with appressed white and sometimes also black hairs 0.1-0.25 mm; leaflets in 5-7(or 8) pairs, narrowly elliptic, 5-12 × 3-4 mm, sparsely appressed hairy abaxially, glabrous adaxially, apex obtuse. Racemes densely many flowered; peduncle 2-8 cm, in upper part loosely covered with appressed black hairs; bracts linear, 1-2.5 mm, sparsely black hairy. Calyx 2-3(-4) mm, appressed black hairy, more rarely with some white hairs; teeth unequal, 1-1.5 mm. Petals intensely violet (also in dry state); standard widely elliptic to suborbicular, 5-8 × 4-5 mm, apex rounded to slightly incised; wings 5-7 mm; keel 4-5 mm. Legumes angled-globose, 3-4 mm, rounded at apex without beak, deeply grooved dorsally, 2-locular; valves thin, cross-wrinkled, covered with spreading white and black hairs.
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