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Organism
  Plantae
      Magnoliophyta
          Eudicots
                 [Magnoliopsida]
            Core Eudicots
              Rosids
              Fabids
                    Fagales
                            Betulaceae
                                     Alnus
                                             Alnus acuminata
                                               Alnus acuminata subsp. acuminata
                                                     [Alnus ferruginea]
                                               Alnus acuminata subsp. arguta
                                             Alnus glutinosa
                                             Alnus incana
                                             Alnus jorullensis
                                     Betula
                                             Betula alleghaniensis
                                     Carpinus
                                             Carpinus betulus
                                             Carpinus caroliniana
                                             Carpinus orientalis
                                     Corylus
                                             Corylus avellana
                                             Corylus colurna
                                     Ostrya
                                             Ostrya carpinifolia
                                             Ostrya italica
                                               Ostrya italica subsp. carpinifolia