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For other uses, see Beech (disambiguation). Beech (Fagus) is a genus of deciduous trees in the family Fagaceae, native to temperate Europe, Asia and North America. Recent classification systems of the genus recognize ten to thirteen species in two distinct subgenera, Engleriana and Fagus.
American beech (Fagus grandifolia) is the only species of this genus in North America. Although beech is now confined to the eastern United States (except for the Mexican population) it once extended as far west as California and probably flourished over most of North America before the glacial period (39).eech root systems are more shallow than the associated yellow birch and sugar maple. Few tree species are less tolerant of flooding during the growing season than American beech. Root exudates of beech contain more organic acids than those of sugar maple or yellow birch.