Picture taken on the1st July 2007, near Aiguablava Parador, Costa Brava, Girona, Catalonia, on granodiorites, siliceous rock, Nord oriented, vertical position, 15 m. altitude, close the sea.
Very common lichen in Catalonia and Europe. Rather variable.
Saxicolous, gray, forming large patches, thick and warted. Large lecanorine apothecia.