Herbs, to 30 cm tall or more, acaulescent, from a multiheaded caudex, clothed with marcescent leaf bases and stipules, grayish pubescent. Stipules with a lanceolate-subulate free part, sparsely to densely appressed pubescent, adnate to petiole, base triangular, margin ciliate. Leaves 5-15 cm, 13-25-foliolate; leaflet blades oblong, broadly elliptic-lanceolate, or lanceolate, 5-20 × 2-5 mm, both surfaces sparsely pubescent, margin slightly involute, apex acute. Racemes lax, many flowered, elongating to 10-20 cm after anthesis; peduncle 15-25 cm, 1-2(-3) × as long as leaves, with appressed sparse white trichomes; bracts subulate, with sparse trichomes. Calyx campanulate, 3.6-5 mm, with appressed black trichomes; lobes subulate, ca. 1.3 mm, shorter than tube. Corolla purple to almost white; standard 7-10 mm, lamina suborbicular, apex emarginate; wings as long as or slightly shorter than standard; keel ca. 8.8 mm, as long as or longer than wings, tip spotted, beak 0.5-1.8 mm. Legume stipitate; stipe 4-5 mm; body broadly ellipsoid-oblong, 10-16 × 5-6 mm, pendulous, papery, with appressed white trichomes, apex acuminate. Fl. Jun-Jul, fr. Jul-Aug. 2n = 16, 32.
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