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Mark Hyde, Bart Wursten and Petra Ballings   cc-by-nc

Ophioglossum (Adderstongue) is a genus of herb in the family Ophioglossaceae. They are native to Hawaii, Pacific Basin excluding Hawaii, Canada, The Contiguous United States, U.S. Virgin Islands, Greenland, Saint-Pierre Et Miquelon, Alaska, and Puerto Rico. They have simple leaves. Individuals can grow to 8 m. They have alternation of generations.

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EOL has data for 18 attributes, including:

Known occurrences, collected specimens and observations of adderstongue. View this species on GBIF