Order: Lecanorales       Family: Lecanoraceae Species: Lecanora polytropa Growth type crustose. Photos: On acidic upland rock and worked timber. Ballingeary, Cork, SW Ireland. Specimens identified by John Douglass and Brian Coppins. Small inconspicuous or areolate yellowish-green or grey-green thallus, often with black prothallus. Small pale yellow to greenish-yellow convex apothecia, paler margin becoming excluded. Common throughout Ireland on siliceous rocks, walls and worked timber. Thallus K+ indistinct yellow, C-, KC+ yellow, P-, UV-

Lecanora polytropa June 2009 and January 2010