Stems 10-15 cm tall, with many branches. Leaves 2-10 cm, 5-17-foliolate; stipules ovate-lanceolate, 5-6 mm, adnate to petiole for ca. 1/2 its length; axis and petiole with dense spreading long hairs or short appressed hairs; leaflet blades obovate or obovate-oblong, 4-16 × 2-4 mm, both surfaces with dense spreading long or short appressed hairs, base rounded, apex rounded, cuneate, or emarginate. Racemes umbellate, 1-4-flowered; peduncles 3-10 mm, with dense white appressed hairs; pedicels 2-4 mm. Calyx tubular, 15-17 mm, gibbous at base, inflated on one side; teeth lanceolate, shorter than tube, with black glands at apex. Corolla purple; standard 20-30 mm, with short appressed hairs abaxially; wings 18-28 mm; keel slightly shorter than wings. Legume linear, 4-6 cm × 8-10 mm, glabrous when mature. Fl. Jul, fr. Aug.
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