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Diplazium expansum (Great Fern) is a species of perennial herb in the family Athyriaceae. They are native to Mata Atlântica, Paraná, Minas Gerais, Puerto Rico, Espirito Santo, Santa Catarina, SãO Paulo, Pernambuco, Rio Grande Do Sul, Rio De Janeiro, Alagoas, and Bahia. They have alternation of generations.

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EOL has data for 10 attributes, including:

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