''Pertusaria lactea'' is a species of warty

crustose Crustose is a habit of some types of algae and lichens in which the organism grows tightly appressed to a substrate, forming a biological layer. ''Crustose'' adheres very closely to the substrates at all points. ''Crustose'' is found on rocks and ...

lichen A lichen ( , ) is a composite organism that arises from algae or cyanobacteria living among filaments of multiple fungi species in a mutualistic relationship.Pertusariaceae The Pertusariaceae are a family of lichen-forming fungi in the order Pertusariales. Taxonomy The family was formally circumscribed by German lichenologist Gustav Wilhelm Körber in 1846. It contained the genera ''Pertusaria'' and '' Ochrolechi ...

family. These lichens are white to cream or pale grey. They mainly can be found on northern exposed siliceous or calcareous rocks. This species is present in North America, Arctic, Europe, Asia and South Africa.Discover Life
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References

lactea Lichen species Taxa named by Carl Linnaeus Lichens of the Arctic {{Pertusariales-stub