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Placynthium nigrum

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Placynthium nigrum 1
On rock. From the North Shore of Lake Superior, Ontario.
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Placynthium nigrum 2
On rock. From the Chiracahua Mountains, southern Arizona.
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Placynthium nigrum 3
On rock. From Zion National Park, Utah.
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Placynthium nigrum 4
On rock. From SW of Burr Oak, Winneshiek County, Iowa.


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Platismatia glauca

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