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.

This species is cultivated in Anhui, Jiangsu, and Shandong.

● Thickets and trailsides on slopes. Henan, Shaanxi.