Non-forest alpine plant communities exist ... and yellow birch are the predominant tree species. Yellow birch occurs most frequently at the lower limits of this community. Lesser amounts of red spruce ...

Acid rain’s harms compounded atop New England mountains, where alpine forests were enshrouded in cloud cover and high ...

Its flourishing alpine ... spruce, and fir. Mossy lichens add brushstrokes on its ancient crystalline rocks that also trap quarries of gold, silver, and platinum. And now these additional 30 trees ...