Lecanora circumborealis Brodo & Vitik.  
Family: Lecanoraceae
Lecanora circumborealis image
H.T. Lumbsch  
Lecanora circumborealis image
Stephen Sharnoff  
Lecanora circumborealis image
Stephen Sharnoff  
Lecanora circumborealis image
Stephen Sharnoff  
Lecanora circumborealis image
Lecanora circumborealis image