Collection location: Parque Nacional Villarrica, Araucanía, Chile [Click for map]
On dry, open Nothofagus trunk, at edge of field.
P. intricata is a variable cosmopolitan species characterized by cyanobacterial photobiont, sorediate margins (and occasionally linear soralia along cracks on the surface), unwrinkled lobes, white medulla and conspicuous pseudocyphellae underneath, and pale to brown tomentum below. It apparently is easy to confuse with P. norvegica and P. argyracea (better lichenologists than I have done so). However the former has a C+ orange reaction in the medulla (mine is untested), and the latter should be isidiate, not sorediate.
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