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Eukaryota
  Plantae
    Embryophyta
      Polypodiophyta
            Polypodiopsida
                    Psilotales
                            Psilotaceae
                                     Bernhardia
                                     Psilotum
                                             Psilotum nudum
                                                   [Bernhardia capensis]
                                                   [Bernhardia dichotoma]
                                                   [Lycopodium nudum]
                                                   [Psilotum triquetrum]