#genus_Gymnocarpium__Gymnocarpium  oak ferns: in some classification systems included in genus Thelypteris
  supertype:  #fern_genus  genera of ferns and fern allies
  member of:  #family_Dryopteridaceae
  member:  #oak_fern__oakfern__Gymnocarpium_dryopteris__Thelypteris_dryopteris  bright blue-green fern widely distributed especially in damp acid woodlands of temperate northern hemisphere

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