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Verrucaria muralis Ach.  
Family: Verrucariaceae
[Verrucaria muralis var. submuralis (Nyl.) H. Olivier]
Verrucaria muralis image
Othmar Breuss  
Verrucaria muralis image
Andrew Khitsun  
Verrucaria muralis image
Verrucaria muralis image
Verrucaria muralis image
Verrucaria muralis image
Verrucaria muralis image
Verrucaria muralis image
Verrucaria muralis image
Verrucaria muralis image
Verrucaria muralis image
Verrucaria muralis image
Verrucaria muralis image
Verrucaria muralis image