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Blechnaceae, family Blechnaceae | one of a number of families into which the family Polypodiaceae has been subdivided in some classification systems; one of a number of families into which the family Polypodiaceae has been subdivided in some classification systems; includes genera Blechnum, Doodia, Sadleria, Stenochlaena, and Woodwardia ❲Blechnaceae❳ |