Lecanora zosterae (Ach.) Nyl. is a distinct species belonging to the Lecanora dispersa group. In the British Isles it is confined to the coast where it grows mostly on the exposed turf above sea cliffs. Some 76% of the population occurs on decayed thrift Armeria maritima. The related Lecanora umbrina (Ach.) A. Massal. is lectotypified; it is the correct name for Lecanora hagenii auct.