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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 most common edible chestnut species are the American chestnut (Castanea dentata), Chinese chestnut (C. mollissima), Japanese chestnut (C. crenata) and European chestnut (C. sativa).Chinese chestnuts are generally hardy to Zone 5, but some are hardy to Zone 3.he nuts of different species are equally variable. American chestnuts are small, have an easily removable pellicle (the thin brown skin around the nutmeat), and are the sweetest of the edible chestnuts. European species have a variable, usually mild flavor, and Japanese chestnuts are sometimes bitter.