Plants at least 60-70 cm tall, with hairs 0.3-0.5(-1.5) mm. Stem at base up to 8 mm thick, glabrous or with scattered spreading hairs up to 1.5 mm. Leaves 5-9 cm, nearly sessile; stipules 4-10 mm, glabrous or ciliate; rachis sparsely covered with spreading hairs up to 1 mm; leaflets in 3-9 pairs, narrowly ovate to narrowly elliptic, 10-17 × 3-7 mm, both surfaces loosely covered with appressed to subappressed hairs 0.3-1 mm, apex rounded to minutely acuminate. Racemes 4-5 cm, loosely many flowered, soon elongating up to 10 cm; peduncle 5-13 cm, sparsely to loosely covered with appressed to ± spreading white hairs; bracts green, linear-subulate, 5-8 mm, mainly white ciliate. Bracteoles whitish, linear, 0.5-1 mm. Calyx campanulate, 4(-5) mm, tube loosely covered with subappressed black hairs up to 0.3 mm and with a few long white hairs; teeth 0.3-1 mm. Petals lilac or dark purplish; standard obovate, ca. 13 × 7 mm; wings ca. 13 mm; keel ca. 12 mm. Legumes (immature) with a stipe 5-6 mm, narrowly ellipsoid; valves very densely covered with subappressed white and black hairs.
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