-- China ( Anhui , Gansu , Henan , Hubei , Shaanxi , Shanxi ) ; rare in the wild .
-- China ( Anhui , Gansu , Henan , Hubei , Shaanxi , Shanxi ) ; widely cultivated in China , Japan , Europe and North America
-- China ( Anhui , Gansu , Henan , Hubei , Shaanxi , Shanxi ) ; rare in the wild but widely cultivated in China , Japan , Europe and North America