Lecanora crenulata 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

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

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