''Degelia cyanoloma'' is a species of blue-grey to lead-grey

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 mossy trees in undisturbed woodlands. It is found in the

Scottish Highlands The Highlands ( sco, the Hielands; gd, a’ Ghàidhealtachd , 'the place of the Gaels') is a historical region of Scotland. Culturally, the Highlands and the Lowlands diverged from the Late Middle Ages into the modern period, when Lowland Sco ...

western Ireland The West is a strategic planning area within the Northern and Western Region in Ireland. It is a NUTS Level III statistical region of Ireland (coded IE042) under the Eurostat classification. It consists of the counties of Galway, Mayo and R ...

and

Norway Norway, officially the Kingdom of Norway, is a Nordic country in Northern Europe, the mainland territory of which comprises the western and northernmost portion of the Scandinavian Peninsula. The remote Arctic island of Jan Mayen and t ...

(as well as less prolifically in

Spain , image_flag = Bandera de España.svg , image_coat = Escudo de España (mazonado).svg , national_motto = ''Plus ultra'' (Latin)(English: "Further Beyond") , national_anthem = (English: "Royal March") , i ...

France France (), officially the French Republic ( ), is a country primarily located in Western Europe. It also comprises of Overseas France, overseas regions and territories in the Americas and the Atlantic Ocean, Atlantic, Pacific Ocean, Pac ...

and

Portugal Portugal, officially the Portuguese Republic ( pt, República Portuguesa, links=yes ), is a country whose mainland is located on the Iberian Peninsula of Southwestern Europe, and whose territory also includes the Atlantic archipelagos of ...

), 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. ''Degelia cyanoloma'' was previously thought to be a variant of ''

Degelia plumbea ''Degelia plumbea'' (also called blue felt lichen) is a species of grey to blue-black or brown foliose lichen in the genus ''Degelia''. It mostly grows on trees in undisturbed woodlands but occasionally on coastal rocks. It is found widely in Bri ...

''.

References

Peltigerales Lichen species Lichens of Europe {{Peltigerales-stub