Cetraria ericetorum Opiz

Cetraria ericetorum, as its name suggests, is most often found in heathlands and similar habitats on acidic soil from lowlands to subalpine zone or even in open pine forests. It's a way rarer than the similar C. islandica from which it differs in smaller size and narrower lobes, in pseudocyphellae placement and in secondary metabolites. Within the species range, several subspecies are recognised: the nominate one occurs in Europe, Mongolia and in southeastern North America.

Ascomycota → Lecanoromycetes → Lecanorales → Parmeliaceae → Cetraria