Morphologically and ecologically very similar to P. adscendens but distinguished by labriform soralia (sometimes called lip-shaped). Most commonly, it is epiphytic, both in open landscapes and forests but also grows on rocks, mainly calcareous or rich in nutrients. Generally, it is a nitrophilous species that tolerates high dustiness and eutrophication. It is very common and widely distributed in Europe as well as in the Czech Republic. Here, it occurs from lowlands to mountains and is one of the most abundant lichen species.taxonomic classification:
All records: 1448, confirmed 879. One click on a selected square displays particular record(s), including their source(s).