Beautiful. If you trust Brodo, it's well within the range for Psora pseudorussellii. But with a small range extension, you can call it P. tuckermanii, which is a bit larger and has apothecia that are less flat and less red. Tough call form a photo, but the genus is certain.
Susan Elliott
2015-04-08
2015-04-08
United States of America, Texas, Lake Colorado City State Park, Texas