Description from Flora of China
Shrubs, usually 1-2 m tall. Young branches appressed or ascending hairy. Petiole 1-5 cm, appressed or ascending pubescent; stipels absent, rarely rudimentarily present and linear on base of petiolule of lateral leaflet; leaflets oblong or ovate, rarely obovate, terminal one 1.2-6.5 × 0.7-3.7 cm, abaxially sparsely to densely ascending pubescent, adaxially glabrous or sparsely pubescent, base obtuse or rounded, apex retuse and mucronulate. Racemes 2.5-15 cm, sometimes paniculate; rachis and pedicels appressed or ascending pubescent mixed with glandular hairs. Pedicels 2-11 mm. Calyx ± densely appressed or ascending shortly hairy mixed with glandular hairs; tube 1.2-2 mm; lobes triangular, 0.8-3 mm. Corolla purple to pinkish white; standard elliptic, 11-12 mm, apex obtuse; wings 10-12 mm, clawed at base; keel incurved, 11.5-14.5 mm, clawed at base. Ovary 2.5-3 mm; style incurved, 8.5-9 mm. Legume obliquely obovoid to oblong, 9-15 × 3.5-6 mm, lateral surface glabrous or pubescent, apex acute. Seeds reddish brown, reniform, 2.7-5 × 1.5-3 mm.
Mountain slopes, valleys, thickets, forest margins, streamsides, forests, open places; 100-2000 m. Anhui, Fujian, Gansu, Guangdong, Guangxi, Guizhou, Hebei, Henan, Hubei, Hunan, Jiangsu, Jiangxi, Liaoning, ?Nei Mongol, Shaanxi, Shandong, Shanxi, Sichuan, Taiwan, Yunnan, Zhejiang [Korea].