A xerothermic Mediterranean lichen growing on sun-exposed calcareous rocks. It has a pruinose sublobate thallus, 1-septate ascospores and no prothallus. It is easily confused with the little known P. tremniacum, which, however, differs in prothallus presence. In the Czech Republic, it was discovered only recently (Svoboda 2007) in the Český kras (the Bohemian karst) and is not known from elsewhere.
Literature: Svoboda D. (2007): Lichens of the central part of the Bohemian Karst. – Novitates Botanicae Universitatis Carolinae 18: 15–52.taxonomic classification:
All records: 4, confirmed 3. One click on a selected square displays particular record(s), including their source(s).