Distribution
This lichen species is broadly distributed and may be found in most cold areas with exposed rock surfaces. The North American range includes the Sierra Nevada and northern Boreal forests of Canada, Greenland, Iceland, Fennoscandia and Siberia. In the tropics it only occurs at high altitudes such as the Andes of Peru and Colombia. Further south the Map lichen is found broadly across Patagonia, in the Falkland Islands, the sub Antarctic islands and the Antarctic Peninsula.In Britain it can be found commonly growing on hard siliceous rocks, especially in upland regions. Its range covers virtually all of Scotland, much of North West England, and other upland areas in much of the rest of England, Wales and Ireland too.
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