Herbs, 2-8 cm tall, acaulescent, from a superficial or subterranean branched caudex, almost glabrous. Stipules membranous, glabrous or only ciliate, free or slightly adnate to petiole, basally connate. Leaves 2-6 cm, (11 or)13-19(or 21)-foliolate; leaflet blades ovate-lanceolate, ovate-oblong, or ovate, 3-10(-12) × 1.5-4 mm, both surfaces glabrous or sometimes with dense short trichomes, margin sometimes ciliate when young. Racemes compact, 3-7-flowered; peduncle 2-6.5 cm, as long as to longer than leaves, with white trichomes basally intermixed with black trichomes; bracts oblong, 5-6 mm, with black stout trichomes. Calyx campanulate, 6-9 mm, with dense black and white long trichomes; lobes linear-lanceolate, 1.5-1.7 mm, as long as tube, with black cottonlike trichomes. Corolla purple; standard 0.9-1.3 cm, lamina broadly ovate, apex emarginate; wings 1-1.2 cm, slightly shorter than standard, lamina obliquely obovate-oblong, apex retuse; keel 9-10 mm, slightly longer than wings, beak 1-1.2 mm. Legume sessile or shortly stipitate; body cylindric, 10-15 × 3-4 mm, membranous, with appressed black trichomes, abaxial suture round, adaxial suture deeply grooved, beak incurved. Fl. Jun-Jul, fr. Aug.
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