Central Taxonomic Thesaurus
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  Plantae
    Tracheophyta
           [Tracheobionta]
    Spermatophyta
      Magnoliophyta
             [Angiospermae]
         Monocots
                [Liliatae]
                [Liliopsida]
                [Monocotyledoneae]
              Alismatidae
                    Triuridales
                            Petrosaviaceae
                                     Japonolirion
                                             Japonolirion osense
                                     Petrosavia
                                             Petrosavia sakuraii
                                             Petrosavia stellaris