Platismatia glauca??

Platismatia glauca??

Observation - Platismatia glauca??. Description: Found on fallen birch bark. The images aren't great but I can make out soredia on the lobe margins and the brown underside seems quite distinct. Also, I can't see rhizines or any point of attachment.

Found on fallen birch bark. The images aren't great but I can make out soredia on the lobe margins and the brown underside seems quite distinct. Also, I can't see rhizines or any point of attachment.