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Pertusaria corallina (rare fertile state)
Observed: 5th August 2013 By: synan
Added: 17th August 2013
Two large thalli (photo 1) delimited by a ±horizontal boundary (2). Isidia and apothecia appear together on part of the upper thallus (3), but development of isidia appears to have been suppressed in another part (4). Isidia are poorly developed on the lower thallus, which has fewer but larger fertile warts (5). Found on a schistose boulder by an upland stream (6).