Picture taken on the 28th April 2007 at Targasonne, Alta Cerdanya, Oriental Pyrenees, France, Catalonia, on the top of an isolate granite boulder forming part of a coprophilous lichen community, very sunny and windy place, 1.650 m. altitude.
Lichen common on siliceous rocks in the subalpine and alpina stages. In Ctalonia It has been found at Montseny and the Pyrenees.
Crustose lichen, on siliceous rocks,that resists the ammonia ions and the nitriphication of the bird droppings.
S'ha de reconèixer que erets la persona indicada per fer aquesta "Flora virtual liquènica" ja que, entre altres coses, et mous en ambients i hàbitats molt variats. Molt bona la captura i molt interessant l'explicació.