Picture taken on the 20th January 2008, near Sant Jaume ermitage, Sant Cristòfol, Montserrat, Barcelona, Catalonia, on hard and vertical limestone in a wall.
Crustose lichen growing always on limestone, thallus finely granular, immersed in certain parts, pale brown, with darker prothallus. Perithecia abundant and completely sunk in the pits of the limestone, sometimes irregular in shape, irregularly dispersed.
Already mentioned in Catalonia, frequent in the French Provence.