#oak_fern__oakfern__Gymnocarpium_dryopteris__Thelypteris_dryopteris  bright blue-green fern widely distributed especially in damp acid woodlands of temperate northern hemisphere
  supertype:  #fern  any of numerous flowerless and seedless vascular plants having true roots from a rhizome and fronds that uncurl upward; reproduce by spores
  member of:  #genus_Gymnocarpium__Gymnocarpium  oak ferns: in some classification systems included in genus Thelypteris
     member of:  #family_Dryopteridaceae__Dryopteridaceae__Athyriaceae__family_Athyriaceae  alternative names for one of a number of families into which the family Polypodiaceae has been subdivided in some classification systems
        member of:  #class_Filicopsida__Filicopsida__Filicinae__class_Filicinae  ferns
           member of:  #division_Pteridophyta__Pteridophyta  containing all the vascular plants that do not bear seeds: ferns, horsetails, club mosses, and whisk ferns; in some classifications considered a subdivision of Tracheophyta
              member of:  #kingdom_Plantae__Plantae__plant_kingdom__plantkingdom  taxonomic kingdom comprising all living or extinct plants

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