Juglans regia

Juglans regia, the Persian walnut, English walnut, Carpathian walnut, Madeira walnut, or, especially in Great Britain, common walnut, is an Old World walnut tree species native to the region stretching from the Caucasus eastward to the Kashmir region. It is widely cultivated across Eurasia and Northern America. The species is the origin of cultivated varieties which produce the edible walnut, consumed around the world and produced predominately in China.