Common Toadskin Lichen

Lasallia papulosa

''Lasallia papulosa'' is an umbilicate lichen . It is in the Umbilicariaceae family.
Taxonomy
KingdomFungi
DivisionAscomycota
ClassLecanoromycetes
OrderUmbilicariales
FamilyUmbilicariaceae
GenusLasallia
SpeciesL. papulosa