Caloplaca (biatorina?) "Orange Rock Firedot Lichen" 

National Bison Range, MT
June 8, 2014
Robert Niese

Caloplaca lichens are a relatively abundant, easily recognizable group of lichens here in the PNW. Most orange, crustose lichens growing on rocks in our area belong to this genus. Unfortunately, the genus is impossibly large and making species identifications may require a close analysis of spore morphology.