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Observed: 28th April 2013 By: Paul Roberts
Added: 28th April 2013
Lichen (left) on an old oak branch. Overall form and "net" marks suggest P. sulcata but P. saxatilis (or something else?) seems possible. Went for P. sulcata as more common and, although rural, this location is close to busy roads, housing, some air pollution probable. Grateful for any suggestions.