... , remove stems and impurities. Schisandra distributed in northeast, north, and Gansu, Ningxia, Anhui, Jiangxi, Henan, Hunan, Sichuan, Guizhou, sphenanthera distributed in ... Shanxi, Shaanxi, Gansu, Anhui, Zhejiang, Jiangxi, Fujian, Henan, Hubei, Hunan, Sichuan , Guizhou, Yunnan ...