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  Plantae
    Viridiplantae
     Streptophyta
     Embryophyta
      Tracheophyta
        Spermatophytina
            Gnetopsida
                   [Gymnospermae]
              Gnetidae
                    Ephedrales
                           [Gnetales]
                           [Welwitschiales]
                            Welwitschiaceae
                                     Welwitschia
                                             Welwitschia mirabilis