Plants 30-60 cm tall. Stems covered with short appressed hairs. Leaves 6-12 cm; stipules 6-7 mm, vaginate-connate in lower 1/2, ciliate; petiole short; leaflets in ca. 10 pairs, narrowly ovate, 5-19 × 2.5-6 mm, abaxially sparsely covered with short hairs, adaxially glabrous, apex rounded to slightly emarginate. Racemes ca. 3 cm, dense; peduncle 2.5-6 cm, shortly appressed hairy; bracts membranous, linear-acute, ca. 3 mm, ciliate. Calyx campanulate, ca. 9 mm, covered with short appressed black hairs; teeth subulate, ca. 4 mm, more densely black hairy. Petals purple; standard narrowly oblong, ca. 18 × 6 mm, apex emarginate; wings ca. 15 mm; keel ca. 12.5 mm. Legumes shortly stipitate, narrowly oblong, 14-16 mm, keeled ventrally, subtriangular in cross section; valves transversely reticulate, densely covered with spreading white hairs.
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