Spruce, fir, rhododendron, mountain laurel, heath and heather are examples.
From the washingtonpost.com
It was also, in many places, difficult terrain, with woodland, heath and mountain over much of the centre and large areas of marshland to the east.
From the en.wikipedia.org
The mountain vegetation is largely composed of heath around the summit plateau with evergereen forest along the wetter eastern slopes and grassland to the western side.