#fern_family  families of ferns and fern allies
  supertype:  family  (biology) a taxonomic group containing one or more genera; "sharks belong to the fish family"
  subtype:  family_Hymenophyllaceae  family_Osmundaceae  family_Schizaeaceae  family_Marsileaceae  family_Salviniaceae  family_Azollaceae  family_Ophioglossaceae  family_Gleicheniaceae  family_Parkeriaceae  family_Polypodiaceae  family_Adiantaceae  family_Vittariaceae  family_Aspleniaceae  family_Blechnaceae  family_Cyatheaceae  family_Davalliaceae  family_Dennstaedtiaceae  family_Dicksoniaceae  family_Dryopteridaceae  family_Lomariopsidaceae  family_Lophosoriaceae  family_Loxomataceae  family_Oleandraceae  family_Pteridaceae  family_Marattiaceae  family_Psilotaceae  family_Psilophytaceae  family_Rhyniaceae  family_Equisetaceae  family_Lepidodendraceae  family_Lycopodiaceae  family_Selaginellaceae  family_Isoetaceae  family_Cryptogrammataceae  family_Thelypteridaceae
  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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