Shrublets, erect, 30-60 cm tall. Stems flexuous, terete or angular, with appressed white or brown basifixed crisped trichomes. Stipules linear, ca. 8 mm. Leaves 8-15(-20) cm, 5-25-foliolate; petiole 1-3 cm; rachis terete to slightly flattened, adaxially grooved, with appressed crisped trichomes; stipels subulate, ca. 3.5 mm; petiolules 1.5-2 mm, hairy; leaflet blades opposite, ovate, broadly ovate, or elliptic, 1.3-7 × 1-3.7 cm, stiffly papery, abaxially with spreading crisped basifixed trichomes, adaxially with sparse appressed medifixed trichomes, midvein adaxially flat to slightly impressed, secondary veins 6 on each side of midvein and looped near margin, base cuneate to rounded, apex rounded to acute and mucronate. Racemes 3-25 cm; peduncle 1-7 cm, with spreading crisped trichomes; bracts linear, 3-5.5 mm. Pedicel 2-2.5 mm. Calyx campanulate, 4-4.5 mm, with sparse spreading crisped trichomes; teeth lanceolate, unequal, most abaxial one as long as tube. Corolla pale purple or white; standard obovate-elliptic, 10-13 × 5.5-7.5 mm, outside with dense appressed white trichomes, base broadly cuneate, apex obtuse; wings 1.1-1.2 cm, margin ciliate; keel 1.1-1.4 cm. Stamens 1.2-1.3 cm; anthers ovoid-ellipsoid, both ends hairy. Ovary glabrous. Legume cylindric, 3-5 cm, glabrous; endocarp not blotched. Fl. May-Sep, fr. Sep-Oct.
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