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The chestnut group is a genus (Castanea) of eight or nine species of deciduous trees and shrubs in the beech family Fagaceae, native to temperate regions of the Northern Hemisphere. Asiatic species Castanea crenata (Japanese chestnut), Castanea mollissima (Chinese chestnut), Castanea davidii (China), Castanea henryi (Chinese chinkapin, also called Henry's chestnut â China) and Castanea seguinii (also called Seguin's chestnut â China).
The American chestnut, Castanea dentata, is a large, monoecious deciduous tree of the beech family native to eastern North America.Before the species was devastated by the chestnut blight, a fungal disease, it was one of the most important forest trees throughout its range.There are now very few mature specimens of the tree within its historical range, although many small shoots of the former live trees remain.t has several related chestnut species, such as the European sweet chestnut, Chinese chestnut, and Japanese chestnut, which are distinguishable from the American species by a few morphological traits, such as leaf shape, petiole length and nut size.