The flowers are purple or purplish-red, with a corolla tube extending slightly beyond the calyx, lips 3-lobed with the middle lobe inverted-heart shaped and side lobes ovate-triangular.
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.
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.
Sichuan, Guizhou, Guangxi, and Guangdong provinces in China, growing on rocky slopes, under forests, and along ditches at elevations of 530-1300 meters.