A crustose lichen associated with hard and exposed siliceous rocks (usually granite), with high quartz content, where it typically grows at the upper edges. It is almost always accompanied by yellow Rhizocarpon species, which it parasites at the beginning of its development. In the Czech Republic, the lichen is scattered at the middle and higher elevations, mainly in the western part. It is abundant on screes in the Brdy highlands. The oldest known Czech specimens were collected in the 1930s by J. Nádvorník in the Žďárské vrchy hills (Poelt & Leuckert 1991). However, most of its records are recent, i.e. from the last three decades.
Literature: Poelt J. & Leuckert C. (1991): Der Formenkreis von Protoparmelia atriseda (Lichenes, Lecanoraceae) in Europa. – Nova Hedwigia 52: 39–64.
taxonomic classification:Ascomycota → Lecanoromycetes → Lecanorales → Parmeliaceae → Protoparmelia
Red List (Liška & Palice 2010):NT – near threatened
Red List (Malíček 2023):C3 – endangered
Occurrence in the Czech Republic
All records: 37, confirmed 36. One click on a selected square displays particular record(s), including their source(s).