Lianas. Stems thick, densely gray villous. Leaves 9-or 11-foliolate; rachis 15-32 cm, including petiole 2-5 cm; leaflet blades ovate-oblong to elliptic-oblong, 5-10 × 2.5-3.5 cm, gradually decreasing in size from basal to apical pair, abaxially densely white villous, adaxially sparsely white villous, trichomes persistent on both surfaces, base broadly cuneate to rounded, apex acute to acuminate. Racemes terminal, 30-35 × 8-10 cm. Pedicel 1.5-2.5 cm, straight. Flowers 2.2-2.5 cm, fragrant. Calyx violet, both surfaces tomentose. Corolla violet; standard orbicular, glabrous. Ovary tomentose, with 5 ovules. Legume oblanceolate, 18-24 × ca. 2.5 cm, brown tomentose. Seeds ca. 3 per legume, dark brown, flat and orbicular, ca. 1.5 cm in diam. Fl. Apr-May, fr. Jul-Oct.
Clambering over cliffs and trees on woodland edges. Thicket and roadside on slopes in Anhui, Hebei, Henan, Jiangsu and Shandong Provinces.
Can be grown by cuttings, graftings or seedlings. Seeds needs soaking.
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