Physcia dimidiata (Arnold) Nyl.

Primarily a saxicolous lichen characterized by tiny crystals on the lobe surface. Most commonly it occurs on calcareous silicates but there are records from many other rock types, such as acidic silicates or carbonated substrates. It prefers vertical, sun-exposed to half-shaded natural rocks but is also known from anthropogenic substrates and trees. In Europe, the species is widely distributed but only scattered. In the Czech Republic, it grows from lower to middle elevations, typically in river valleys.

Ascomycota → Lecanoromycetes → Caliciales → Physciaceae → Physcia