Lecanoraceae Myriolecis crenulata (Lecanora crenulata) Growth type crustose Chemical results negative, UV- Found on hard limestone rocks, calcareous monuments, walls and mortar Thallus usually immersed, pale grey, smooth or slightly granular. Apothecia often in small groups, discs brownish to brown-black, greyish pruinose. Margins white, well-developed, persistent, deep and regularly crenate. Member of the Lecanora dispersa group Similar: Lecanora antiqua (L. conferta), pruinose apothecia C+ orange. Lecanora agardhiana has smaller apothecia immersed in pits in rock

Lecanora crenulata
Holy Rood church, Wool, and St. Hubert's, Corfe Mullen, Dorset. February 2013 and January 2014