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    • Porpidiaceae
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Concentric boulder lichen (Porpidia crustulata) growing on siliceous rock (sandstone). Derbyshire, England, UK, September.
01520957
Chris Mattison / Concentric boulder lichen (Porpidia crustulata) growing on siliceous rock (sandstone). Derbyshire, England, UK, September.
Two lichens, Concentric boulder lichen (Porpidia crustulata) and Lecidea lithophila, on sandstone. Derbyshire, England, UK, September.
01520956
Chris Mattison / Two lichens, Concentric boulder lichen (Porpidia crustulata) and Lecidea lithophila, on sandstone. Derbyshire, England, UK, September.