Species: Aspicilia cinerea agg.
Photos: On coastal rock. Toormore, Cork, SW Ireland.
Identification needs confirming
Thallus is greyish or greenish-brown, often with a grey prothallus. Areoles cracked and warted. Immersed flat black apothecia with persistent margins. Soredia and isidia are absent.
K+ red, P+ orange
Probably an aggregate of species occuring on flat, nutrient-rich, well-lit siliceous rocks.
Aspicilia cinerea agg. January 2009