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Ramalinaceae
Lecania erysibe sens str. Growth type crustose. Chemical results negative Common on nutrient-enriched bricks, walls, church memorials and asbestos-cement. Occasional on decaying wood. Very variable. Grey or greenish-brown thallus is thin or cracked and areolate, scurfy, often densely blastidiate. Usually fertile with small orange-brown to blackish discs, thin, paler margins becoming excluded. Spores 1-septate, 9-16 × 3-5 µm. Micrograph below. Host to Intralichen lichenum Similar: 
Lecania erysibe s. lat. includes
Lecania erysibe,
Lecania hutchinsiae,
Lecania inundata,
Lecania rabenhorstii,
Lecania sylvestris and
Lecania turicensis
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Microscope photograph
Lecania erysibe
Studland and Canford Magna, Dorset. January 2015 and 2016