''Degelia plumbea'' (also called blue felt lichen) is a species of grey to blue-black or brown
foliose
Foliose lichen is one of the morphological classes of lichens, which are complex organisms that arise from the symbiotic relationship between fungi and a photosynthetic partner, typically algae. This partnership allows lichen to live in diverse ...
lichen
A lichen ( , ) is a composite organism that arises from algae or cyanobacteria living among filaments of multiple fungi species in a mutualistic relationship.[Degelia
''Degelia'' is a genus of lichen-forming fungi in the family Pannariaceae. The genus is named after Swedish lichenologist Gunnar Degelius.
The genus was circumscribed by Lars Arvidsson and David John Galloway in 1981.
Species
*''Degelia calc ...]
''.
It mostly grows on trees in undisturbed woodlands but occasionally on coastal rocks.
It is found widely in Britain and western Ireland as well as in America and Canada, as it grows in
maritime
Maritime may refer to:
Geography
* Maritime Alps, a mountain range in the southwestern part of the Alps
* Maritime Region, a region in Togo
* Maritime Southeast Asia
* The Maritimes, the Canadian provinces of Nova Scotia, New Brunswick, and Princ ...
Atlantic climates.
''D. plumbea'' is highly sensitive to
acid rain
Acid rain is rain or any other form of precipitation that is unusually acidic, meaning that it has elevated levels of hydrogen ions (low pH). Most water, including drinking water, has a neutral pH that exists between 6.5 and 8.5, but acid ...
and climatic changes.
''
Degelia cyanoloma
''Degelia cyanoloma'' is a species of blue-grey to lead-grey foliose lichen in the genus Degelia. It mostly grows on mossy trees in undisturbed woodlands. It is found in the Scottish Highlands, western Ireland and Norway (as well as less prolifi ...
'' was previously thought to be a variant of ''D. plumbea''.
References
Peltigerales
Lichen species
Lichens described in 1777
Lichens of Europe
Lichens of North America
Lichens of Eastern Canada
{{Peltigerales-stub