Picture taken during the summer at the Chaos of Tagasonne (morrenic granite boulders), Oriental Pyrenees,Northern Cerdanya, France, Cataloniam, 1.500 m. altitude in humid places.
Common foliose lichen upland in the Pyrenees on granite and among mosses, large and wide lobes, grey, cyllindric isidia, black, uneven surface.
It was used for the dying manufacturing, brown and red colours.
Cortex K+ yellow.
Medulla K+ from yellow to red, C-, KC+ orange, P+ from yellow to red.