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Observed: 28th August 2013 By: synan
Added: 30th August 2013
Overgrowing bryophytes on calacereous sandstone boulder with Sticta sylvatica in damp, humid woodland. Lobes blue-grey, wrinkled to distinctly ridged (especially on the lower surface), deeply divided; margins with subcylindrical to coralloid-branched isidia (or isidia-like outgrowths).