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Eukaryota
  Plantae
    Embryophyta
      Gnetophyta
            Gnetopsida
                    Welwitschiales
                            Welwitschiaceae
                                     Welwitschia
                                             Welwitschia mirabilis
                                                   [Welwitschia bainesii]
                                                   [Welwitschia mirabilis subsp. namibiana]