Herbs, 20-40 cm tall, caulescent, from slender rhizomatous multiheaded caudex. Stems erect with 2-4 apparent internodes, sparsely short pubescent. Stipules with an ovate-lanceolate to lanceolate distinct part, 0.9-1.2 cm, with dense white long trichomes, basal half connate. Leaves 5-10(-12) × (1.5-)2-4 mm, 15-23-foliolate; petiole and rachis with sparse trichomes; petiole 0.5-4 cm; leaflet blades ovate-lanceolate to oblong, 6-17 × 2-5 mm, both surfaces with appressed white trichomes, base rounded, apex acute. Racemes dense, many flowered; peduncle 10-16 cm; bracts lanceolate to ovate-lanceolate, 6-11 mm, with dense long trichomes. Calyx broadly cylindric, 7.5-11(-11.2) × ca. 3 mm, with dense long trichomes; lobes linear, (3-)5-6 mm. Corolla pale purple; standard 1.5-1.6 cm, lamina ovate, ca. 8 mm wide, apex emarginate; wings 1.2-1.4 cm, lamina obliquely obovate and ca. 4 mm wide, apex retuse to slightly emarginate; keel 1-1.2 cm, beak ca. 1 mm. Legume sessile, cylindric, 1.5-2 × ca. 0.4 cm, with spreading dense white and black short trichomes, adaxial suture deeply grooved, apex acute. Fl. Jul-Aug, fr. Aug-Sep.
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