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Added: 30th August 2012
Warty, light grey areolate crustose thallus. Dark prothallus just visible top left and along the top of the pictures. Large black lecideine apothecia (fingertip for scale). Some of the apothecia look lumpy and distorted. Growing on siliceous rock,millstone grit erratic, near limestone path. Possibly Porpidia macrocarpa.