Aspicilia cinerea (L.) Körb.

A species typical for exposed siliceous rocks of any pH. It often grows on rock tops, that are enriched with nutrients (e.g. from bird excrements). In the northern hemisphere, it is widespread. In the Czech Republic, it occurs scattered at lower and middle elevations. In the field, it can be confused, for example, with a similar but rarer Aspiciliella intermutans.

Ascomycota → Lecanoromycetes → Pertusariales → Megasporaceae → Aspicilia