#hard_fern  any of several ferns of the genus Blechnum
  supertype:  fern  any of numerous flowerless and seedless vascular plants having true roots from a rhizome and fronds that uncurl upward; reproduce by spores
  subtype:  deer_fern  fern with erect fronds of Europe and western North America; often cultivated for deer browse
  member of:  genus_Blechnum__Blechnum  in some classification systems placed in family Polypodiaceae; terrestrial ferns of cosmopolitan distribution mainly in southern hemisphere: hard ferns
     member of:  family_Blechnaceae__Blechnaceae  one of a number of families into which the family Polypodiaceae has been subdivided in some classification systems; includes genera Blechnum; Doodia; Sadleria; Stenochlaena; Woodwardia
        member of:  order_Filicales__Filicales__Polypodiales__order_Polypodiales  true (leptosporangiate) ferns
           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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