Rhizocarpon disporum (Nägeli ex Hepp) Müll. Arg.
Fungi | Ascomycota | Lecanoromycetes | Rhizocarpales | Rhizocarpaceae | Rhizocarpon | Rhizocarpon disporum
massive slab just below upper bluff face of north-facing canyon wall.
Comanche National Grassland: Vogel Canyon