Var. erythrophylla often has larger leaves mostly basal, usually pinnate compound with 1-2 pairs of leaflets, occasionally simple, with serrate margins. The undersides are purple and both surfaces are sparsely to nearly hairless.
It is used in traditional medicine for treating conditions such as hemorrhage, bleeding disorders, wounds, and postpartum chill. Leaves are also applied externally for treating sores and toxins.
Sichuan, Guizhou, Guangxi, and Guangdong provinces in China, growing on rocky slopes, under forests, and along ditches at elevations of 530-1300 meters.
It is found in Hubei, Sichuan, Shaanxi, Hunan, Guangxi, and Yunnan provinces in China, growing under forests, along roadsides, and on grassy slopes at elevations of 700-2000 meters.