Herbs, 20-50 cm tall, caulescent, sparsely appressed pubescent. Stems erect, with 2-4 or more apparent internodes. Stipules ovate-lanceolate with a triangular distinct part, ca. 8 mm, herbaceous, with dense white long trichomes, connate to middle, apex acute. Leaves 6-20 cm, 19-23-foliolate; petiole and rachis adaxially sulcate, with appressed sparse trichomes; leaflet blades ovate, oblong, or lanceolate, 1.4-2 × 0.5-0.9 cm, both surfaces with appressed sparse short trichomes, base rounded to broadly cuneate, apex acute. Racemes lax, many flowered; peduncle 7-18 cm, erect, with incurved white trichomes; bracts linear to narrowly ovate, 3-5 mm, herbaceous, with white short trichomes, apex acuminate. Calyx tubular-campanulate, ca. 8 × 3 mm, with appressed black and white short trichomes; lobes linear, (2.2-)3-5 mm. Corolla purple to bluish purple; standard 1.1-1.5 cm, lamina narrowly or broadly ovate and ca. 6 or 10 mm wide, apex emarginate; wings 1.1-1.4 cm, lamina ca. 3.3 or 4.5 mm wide, apex emarginate; keel 1-1.3 cm, beak 1.5-1.7 mm. Legume pale yellow brown, stipitate; stipe 2.5-3(-6) mm; body oblong, ca. 2.2 × 0.4 cm, inflated, subleathery, 1-locular, adaxially deeply grooved, with appressed black and white trichomes, septum ca. 0.5 mm wide, beak ca. 2 mm. Fl. Jun-Jul, fr. Jul-Aug.
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