The most common Phaeophyscia species, characterized by rounded, laminal soralia. Distinction from its forest relative P. endophoenicea, which forms marginal soralia, may sometimes be problematic. It colonizes a wide range of substrates. It is typically found within epiphytic nitrophilous communities. The lichen is common at dusty places, by roads or within towns. On rock substrates, P. orbicularis prefers nutrient-enriched places, e.g., by bird droppings. In Europe as well as in the Czech Republic, it is very abundant at various elevations.taxonomic classification:
All records: 930, confirmed 488. One click on a selected square displays particular record(s), including their source(s).