Central Taxonomic Thesaurus
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  Plantae
    Tracheophyta
           [Tracheobionta]
    Spermatophyta
      Magnoliophyta
             [Angiospermae]
            Magnoliopsida
                   [Dicotyledoneae]
                   [Magnoliatae]
              Asteridae
                    Scrophulariales
                            Buddlejaceae