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Eukaryota
  Plantae
    Embryophyta
      Polypodiophyta
            Polypodiopsida
                    Marattiales
                            Marattiaceae
                                     Marattia
                                     Myriotheca
                                     Ptisana
                                             Ptisana fraxinea
                                                   [Marattia arguta]
                                                   [Marattia boivinii]
                                                   [Marattia calliodous]
                                                   [Marattia chevalieri]
                                                   [Marattia cuneiformis]
                                                   [Marattia fraxinea]
                                                   [Marattia macrophylla]
                                                   [Marattia microcarpa]
                                                   [Marattia odontosora]
                                                   [Marattia oppositifolia]
                                                   [Marattia sorbifolia]
                                                   [Myriotheca fraxinea]
                                                   [Myriotheca fraxinifolia]
                                                   [Myriotheca sorbifolia]
                                               Ptisana fraxinea var. salicifolia
                                                     [Marattia dregeana]
                                                     [Marattia fraxinea var. salicifolia]
                                                     [Marattia natalensis]
                                                     [Marattia salicifolia var. natalensis]
                                                     [Marattia salicifolia]