What percentage of forested areas are Lodgepole Pine forests ?
Higher elevation subalpine slopes are home to Engelmann spruce ( " Picea engelmannii " ) , subalpine fir ( " Abies lasiocarpa " ) and lodgepole pine ( " Pinus contorta " ) while lower montane forests consist of lodgepole pine , quaking aspen ( " Populus tremuloides " ) , white spruce ( " Picea glauca " ) and Rocky Mountain Douglas - fir .