Hemlock/Northern Hardwoods Forest Association
The hemlock/northern hardwoods forest association is found throughout the Appalachian Plateau Province in western Maryland. It occupies cooler moister sites. Small pockets of hemlock/northern hardwoods may be found in coves in western Montgomery County.
Characteristic tree species include:
Associated tree species include:
Understory plants include:
Herbaceous plants include:
The proportion of species able to tolerate shady conditions may increase over several centuries in the hemlock/northern hardwoods association. Otherwise, this community generally does not change unless the overstory is completely removed. Complete removal by fire, hurricane, or treatments like clearcutting provides enough light for tree species intolerant of shade to become established. Also, if the canopy is completely removed within a short period of time, special efforts may be needed to maintain a component of hemlock.