South-Central Interior Mesophytic Forest
The South-Central Interior Mesophytic Forest is a forest system found along the Allegheny and Cumberland plateaus in unglaciated southwestern Pennsylvania, much of West Virginia, western Virginia, southeastern Ohio, and extends into Kentucky, Tennessee, Georgia, and Alabama, with disjunct occurrences in glaciated northwestern Pennsylvania and southwestern New York where it is now classified as the North-Central Interior Beech-Maple Forest as a result of the Wisconsin glaciation.