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Is this 2 types of lichen - parmotrema and common greenshield ?
This is the species painted by Laws in his "Field Guide to the Sierra Nevada"
Lecanoromycetes is the largest class of lichenized fungi. It belongs to the subphylum Pezizomycotina in the phylum Ascomycota. The asci (spore-bearing cells) of the Lecanoromycetes most often release spores by rostrate dehiscence.