DCNR manages million acres of state forest land and , acres of state park lands for the conservation of native wild plants for the benefit of Pennsylvanians. On DCNR lands and other . About native and 62 introduced tree species grow across Pennsylvania. Its range of topography and climate—from coastal plain to mountain ridge-top and high plateau—allows . Pennsylvania Forests. Most of Pennsylvania’s forest lands fall into two types: Mixed oak forests cover about 54 percent of the Commonwealth --