Newer cultivars stemming from Payne' bear a large proportion of fruit from lateral buds, and thus lend themselves to hedgerow planting, and mechanical pruning. Origin, history of cultivation. J. regia has its origins in eastern Europe, eastward to the Himalayan Mts. However, there are native Juglans in North, Central, and South America, Europe and Asia. Although native to Europe, it probably was not utilized there until improved forms were imported from Persia.
Romans spread cultivation throughout southern Europe.
The species came to the new world with English settlers, and to California via missionaries. Folklore, medicinal and non-food uses. A. Pollen is a common allergen. D. Juglans insularis - used in Cuba. Herb decoction used in bath water for treatment of various skin diseases of children.