Plants 25-50 cm tall, with exception of leaflets and calyx covered with subappressed, bladderlike, minute, predominantly black hairs 0.05-0.2 mm. Stems slender, mostly glabrous at base, in middle part loosely and in upper part more densely hairy. Leaves 2-4.5 cm; stipules 2-5 mm, often reflexed, hairy mostly only at margins; petiole 0.3-0.5 cm, like rachis loosely to rather densely predominantly white hairy; leaflets in 4-10 pairs, 5-10 × 2.5-5 mm, abaxially loosely to rather densely covered with appressed white hairs 0.2-0.35 mm, adaxially glabrous. Racemes short, with 1-6 flowers; peduncle 1.5-4 cm, loosely hairy; bracts 1.5-5 mm, white ciliate. Bracteoles 1-4 mm. Calyx 6-8 mm, covered loosely to rather densely with appressed, mostly dark brown, slender hairs 0.1-0.2 mm; teeth 2.5-5.5 mm. Petals yellow with violet-tipped keel or violet-purple; standard 13-17 × 9-13 mm; wings 11-13 mm; keel 13-14.5 mm. Legumes with a stipe 2.5-3 mm, (13-)17-21 mm, 3.5-6 mm high and wide, with a beak 2-3 mm, 1-locular, glabrous.
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