Lichens of Belgium, Luxembourg and northern France
Placocarpus schaereri (Fr.) Breuss |
Syn.: Dermatocarpon monstrosum (Schaer.) Vain.
On natural, hard calcareous rocks in dry and sunny conditions, initially parasitic on Lecanora (probably L. muralis), soon forming an independent thallus.
Belgium: Mosan: RRR (2000).
Luxembourg: - .
France: - .
Lit.: L6: 145, La66: 192-195.