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Umbilicaria muhlenbergii (Ach.) Tuck.  
Family: Umbilicariaceae
[Actinogyra muhlenbergii,  more]
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Stephen Sharnoff  
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Troy McMullin  
Umbilicaria muhlenbergii image
Troy McMullin  
Umbilicaria muhlenbergii image
Troy McMullin  
Umbilicaria muhlenbergii image
Stephen Sharnoff  
Umbilicaria muhlenbergii image
Stephen Sharnoff  
Umbilicaria muhlenbergii image
Stephen Sharnoff  
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