#psilophyton  any plant or fossil of the genus Psilophyton
  supertype:  vascular_plant__tracheophyte  green plant having a vascular system: ferns, gymnosperms, angiosperms
  member of:  genus_Psilophyton  type genus of the Psilophytaceae: genus of small wiry herbaceous Paleozoic plants with underground rhizomes and apical sporangia
     member of:  family_Psilophytaceae__Psilophytaceae  Paleozoic plants
        member of:  order_Psilophytales__Psilophytales  Paleozoic simple dichotomously branched plants of Europe and eastern Canada including the oldest known vascular land plants
           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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