(1992)  Page(s) 202, 205.  
 
Wild harvested roots of P. lactiflora and P. veitchii (generally with bark intact) are known as chi-shao. They are treated as distinct herbal products and are very commonly used in Chinese medicine. Both are listed as official drugs in the Chinese Pharmacopeia....

Paeonia obovata, found in deciduous forests, forest margins, and mountain valleys in Heilongjiang, Jilin, Liaoning, Hebei, Shanxi, Nei Mongol, Shaanxi, Gansu, Xinjiang, Henan, Anhui, Jiangxi, Hubei, Hunan, Sichuan, Guizhou, and Yunnan, as well as in Sakhalin and Japan, has also been used as a source plant of chi-shao. However, it is reported to be used only as a local source in Shaanxi.

(1992)  Page(s) 202, 205.  
 
Wild harvested roots of P. lactiflora and P. veitchii (generally with bark intact) are known as chi-shao. They are treated as distinct herbal products and are very commonly used in Chinese medicine. Both are listed as official drugs in the Chinese Pharmacopeia....

Paeonia veitchii, growing in elevations of up to 8,100 to 11,000 feet, is found along forest margins, in dark shaded forests, and on mountainsides in Shanxi, Shaanxi, Gansu, Qinghai, Sichuan, and Xizang [Tibet]. The root is primarily produced in Sichuan, as well as in Shanxi, Gansu, Shaanxi, and Qinghai, where it is consumed locally.