Index → Navels → Umbilicaria → U. arctica= Gyrophora arctica Ach.
 Location: Nunavut, Continental Central Canadian Arctic, near Hackett River
Date: 2012-08-07
Photo by: Curtis Björk
Notes: On rock in tundra
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 Location: Nunavut, Continental Central Canadian Arctic, near Hackett River
Date: 2012-08-07
Photo by: Curtis Björk
Notes: On rock in tundra
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 Location: Nunavut, Continental Central Canadian Arctic, near Hackett River
Date: 2012-08-07
Photo by: Curtis Björk
Notes: On rock in tundra
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 Location: Northwest Territories, near MacKay Lake
Date: 2011-08-02
Photo by: Curtis Björk
Notes: On siliceous rock in brushy tundra
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