Order: Lecanorales       Family: Lecanoraceae Species: Lecanora campestris Growth type crustose. Photos: On stone wall. Courtmacsherry, Cork, SW Ireland. Greyish-white, warted or areolate thallus usually with fimbriate white prothallus. Large chestnut to dark-brownish apothecia are crowded in centre of thallus. Smooth margins, contorted with age. Frequent on basic to calcareous stone and walls, also found on nutrient-enriched acidic wood and rocks. K+ yellow, C-, P- or P+ very pale yellow, UV- or UV+ dull orange

Photo immediately above: Lecanora campestris on shaded wall. Gougane Barra, Co.Cork. Identified by John Douglass