#silver_fern__Pityrogramma_calomelanos  tropical American fern having fronds with white undersides
  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_Pityrogramma__Pityrogramma  terrestrial tropical ferns having fronds with powdery yellowish or white undersides; sometimes placed in family Polypodiaceae or Adiantaceae
     member of:  #family_Pteridaceae__Pteridaceae  one of a number of families into which the family Polypodiaceae has been subdivided in some classification systems; Pteridaceae is itself in turn sometimes further subdivided
        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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