Purple sage, also known as eba, red sage, white sage, fragrant sage, etc., with the scientific name Perillafrutescens L., is an annual herb in the family Labiatae. With a special aroma, native to China, now mainly distributed in India, Burma, China, Japan, Korea, South Korea, Indonesia and Russia and other countries. There are wild and cultivated species in North China, Central China, South China, Southwest China and Taiwan Province.

Comfrey alias hard comfrey, big comfrey, red striped comfrey 藐, Common Gromwell, Purple Dan, Ground Blood, comfrey velvet, Crow's Bite, Comfrey Roots, Mountain Comfrey, Red Rock Roots. It belongs to the roots of Comfrey (Hard Comfrey) and Xinjiang Comfrey (Soft Comfrey) of the family Comfreyaceae. It has the effect of cooling blood and activating blood circulation, clearing heat and removing toxins, and lubricating intestines and laxatives. Comfrey is distributed in Heilongjiang, Jilin, Liaoning, Hebei, Henan, Shanxi, Jiangsu, Anhui, Jiangxi, Hubei, Hunan, Shaanxi, Sichuan, Guizhou and other places, mainly produced in northeast and north China. Xinjiang comfrey is produced in Xinjiang.