Northern Adderstongue Fern Ophioglossum pusillum Rafinesque  Synonyms: Northern Adder's-tongue Fern, Ophioglossum pycnostichum, Ophioglossum vulgatum var. pycnostichum.

There are 4 records in the project database.

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Northern Adderstongue Fern growing in Prince George's Co., Maryland (6/2/2014). Photo by Fritz Flohr Reynolds. (MBP list)

Northern Adderstongue Fern in Anne Arundel Co., Maryland (4/17/2012). Photo by Bill Harms. (MBP list)


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