Picture taken on the 1st July 2007 at Cala Malaret, between Fornells and Aiguablava, on granodiorite, siliceous rock, vertical position, East oriented, 1 m. altitude, close the sea.
This lichen has to be considered a maritime lichen, living in the supra-littoral zone.It is common.
Crustaceous lichen, thallus very vriable, warted, gray. Sessile apothecia, lecanorine, with a very dark brown-black disc.