A well-recognizable Psora species with grey to grey-green squamules with white margins ang contrasting vividly orange apothecia. It typically grows in cracks in vertical and inclined calcareous rocks, including limestones. The lichen prefers warm, natural, and even relic habitats. The centre of its European distribution lies in the Mediterranean. In the Czech Republic, it is scattered to rare in warm areas, e. g., the surroundings of Prague, Český kras (the Bohemian Karst) and the Pálava Hills.
taxonomic classification:Ascomycota → Lecanoromycetes → Lecanorales → Psoraceae → Psora
Red List (Liška & Palice 2010):VU – vulnerable
Red List (DaLiBor 2023):C2 – strongly endangered
Occurrence in the Czech Republic
All records: 28, confirmed 25. One click on a selected square displays particular record(s), including their source(s).