#horsetail  perennial rushlike flowerless herbs with jointed hollow stems and narrow toothlike leaves that spread by creeping rhizomes; tend to become weedy; common in northern hemisphere; some in Africa and South America
  supertype:  fern_ally  pteridophytes of other classes than Filicopsida
  subtype:  common_horsetail  swamp_horsetail  scouring_rush  marsh_horsetail  wood_horsetail  variegated_horsetail
  part:  strobilus
  member of:  genus_Equisetum__Equisetum  horsetails; coextensive with the family Equisetaceae
     member of:  family_Equisetaceae__Equisetaceae__horsetail_family__horsetailfamily  sole surviving family of the Equisetales: fern allies
        member of:  order_Equisetales__Equisetales  lower tracheophytes in existence since the Devonian
           member of:  class_Sphenopsida__Sphenopsida__Equisetatae__class_Equisetatae  horsetails and related forms
              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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