Picture taken on the 20th January 2007, at Can Coll, Cerdanyola del Vallés, Barcelona, on a wood fence, frequent on decorative bricks.
It is a very common lichen.
Presented for comparing with Lecanora garovaglii. Both belong to the L. muralis group.
Lecanora muralis differs from L. garovaglii mainly because of the more flat tips of the lobes, less plicate and less inflated. For the rest the two species are very similar.