Cladonia didyma (Fée) Vain.  
Family: Cladoniaceae
Cladonia didyma image
Stephen Sharnoff  
Cladonia didyma image
Gary Perlmutter  
Cladonia didyma image
Troy McMullin  
Cladonia didyma image
Stephen Sharnoff  
Cladonia didyma image
Stephen Sharnoff  
Cladonia didyma image
Stephen Sharnoff  
Cladonia didyma image
Gary Perlmutter