Rhizoplaca occulta

About

Rhizoplaca occulta is a species of crustose lichen in the family Lecanoraceae. The species was described in 2013 after DNA analysis revealed it had long been hidden within the broadly defined species complex based around the widespread Rhizoplaca melanophthalma. Rhizoplaca occulta is a highly variable lichen can form either tightly attached, radiating growths with dark centers or loose, unattached cushions that roll freely on the ground. It is known only from high-elevation sites in Nevada, Idaho, and Utah, where it grows on exposed, calcium-poor rocks, though reliable identification typically requires both chemical analysis and DNA confirmation due to its variable appearance.

Summary from Wikipedia