A brown-fringed gray foliose lichen overgrowing at least three other morphologies of lichen on a rock. I believe the primary lichen has numerous isidia (small finger-like structures protruding from the thallus). My best guess is that this is in _Physcia_, but I'm not sure. This lichen was found in Vasquez Rocks County Park in Los Angeles County. The scale bar is 5mm (contact me if you want a version of the image without the scale bar).
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