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Eukaryota
  Plantae
    Embryophyta
      Magnoliophyta
            Eudicots
                    Caryophyllales
                            Cactaceae
                                     Austrocylindropuntia
                                             Austrocylindropuntia subulata
                                                   [Austrocylindropuntia subulata subsp. exaltata]
                                                   [Opuntia exaltata]
                                                   [Opuntia subulata]
                                     Cereus
                                             Cereus hexagonus
                                             Cereus hildmannianus
                                             Cereus jamacaru
                                               Cereus jamacaru subsp. jamacaru
                                     Cylindropuntia
                                             Cylindropuntia fulgida
                                                   [Opuntia fulgida]
                                               Cylindropuntia fulgida var. fulgida
                                               Cylindropuntia fulgida var. mamillata
                                             Cylindropuntia imbricata
                                                   [Cylindropuntia rosea]
                                                   [Opuntia imbricata]
                                                   [Opuntia rosea]
                                             Cylindropuntia leptocaulis
                                                   [Opuntia leptocaulis]
                                             Cylindropuntia spinosior
                                     Echinocactus
                                     Echinopsis
                                             Echinopsis oxygona
                                                   [Echinocactus oxygonus]
                                             Echinopsis schickendantzii
                                             Echinopsis spachiana
                                                   [Trichocereus spachianus]
                                     Harrisia
                                             Harrisia bonplandii
                                                   [Harrisia balansae]
                                                   [Harrisia guelichii]
                                             Harrisia martinii
                                             Harrisia pomanensis
                                             Harrisia tortuosa
                                     Hylocereus
                                             Hylocereus undatus
                                     Myrtillocactus
                                             Myrtillocactus geometrizans
                                     Opuntia
                                             Opuntia aurantiaca
                                             Opuntia ficus-indica
                                             Opuntia pubescens
                                                   [Opuntia pumila]
                                             Opuntia salmiana
                                             Opuntia stricta
                                                   [Opuntia dillenii]
                                     Pereskia
                                             Pereskia aculeata
                                     Rhipsalis
                                             Rhipsalis baccifera
                                               Rhipsalis baccifera subsp. mauritiana
                                     Tephrocactus
                                             Tephrocactus articulatus
                                     Trichocereus