Picture taken on the 20th January 2007, near Santa Fe Montseny, Barcelona, on schists, 1100 m. altitude, in a sunny place.
Mediterranean lichen appearing in Macaronesia too. In Catalonia it is mentioned in the littoral range of mountains (Maresma), Cap de Creus and Montseny, always on silicious rocks.
Saxicolous, crustose lichen, thallus white or pale grey, with tones of ochre or green, areolate. Immersed apothecia, flat disc, black, very angular.