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Organism
  Plantae
   Viridiplantae
     Streptophyta
     Embryophyta
      Tracheophyta
        Spermatophytina
            Magnoliopsida
                  Nymphaeanae
                    Nymphaeales
                           [Barclayales]
                           [Cabombales]
                           [Euryalales]
                           [Hydatellales]
                           [Hydropeltidales]
                            Hydatellaceae
                                     Trithuria
                                             Trithuria filamentosa