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Organism
  Plantae
      Tracheophyta
            Equisetopsida
                    Equisetales
                            Equisetaceae
                                     Equisetum
                                             Equisetum arvense
                                                   [Equisetum arvense var. alpestre]
                                                   [Equisetum arvense var. boreale]
                                                   [Equisetum arvense var. riparium]
                                                   [Equisetum calderi]
                                               Equisetum arvense subsp. arvense
                                                     [Equisetum arvense var. alpestre]
                                                     [Equisetum arvense var. boreale]
                                                     [Equisetum arvense var. riparium]
                                                     [Equisetum calderi]
                                               Equisetum arvense var. campestre
                                             Equisetum ferrissii
                                                   [Equisetum hyemale var. elatum]
                                                   [Equisetum hyemale var. intermedium]
                                                   [Equisetum intermedium]
                                             Equisetum fluviatile
                                                   [Equisetum fluviatile var. limosum]
                                                   [Equisetum limosum]
                                             Equisetum hyemale
                                               Equisetum hyemale subsp. affine
                                                     [Equisetum affine]
                                                     [Equisetum hyemale var. affine]
                                                     [Equisetum hyemale var. californicum]
                                                     [Equisetum hyemale var. elatum]
                                                     [Equisetum hyemale var. intermedium]
                                                     [Equisetum hyemale var. pseudohyemale]
                                                     [Equisetum hyemale var. robustum]
                                                     [Equisetum praealtum]
                                                     [Equisetum robustum]
                                                     [Hippochaete hyemalis f. affinis]
                                               Equisetum hyemale subsp. hyemale
                                                     [Hippochaete hyemalis]
                                             Equisetum laevigatum
                                                   [Equisetum funstonii]
                                                   [Equisetum kansanum]
                                                   [Equisetum laevigatum subsp. funstonii]
                                                   [Hippochaete laevigata]
                                             Equisetum litorale
                                             Equisetum mackaii
                                                   [Equisetum variegatum var. jesupii]
                                             Equisetum nelsonii
                                                   [Equisetum variegatum var. nelsonii]
                                             Equisetum palustre
                                                   [Equisetum palustre var. americanum]
                                               Equisetum palustre var. simplicissimum
                                             Equisetum pratense
                                             Equisetum ramosissimum
                                             Equisetum scirpoides
                                             Equisetum sylvaticum
                                                   [Equisetum sylvaticum var. multiramosum]
                                                   [Equisetum sylvaticum var. pauciramosum]
                                             Equisetum telmateia
                                               Equisetum telmateia subsp. braunii
                                                     [Equisetum braunii]
                                                     [Equisetum telmateia var. braunii]
                                               Equisetum telmateia subsp. telmateia
                                                     [Equisetum maximum]
                                             Equisetum trachyodon
                                                   [Equisetum variegatum var. jesupii]
                                             Equisetum variegatum
                                               Equisetum variegatum subsp. alaskanum
                                                     [Equisetum variegatum var. alaskanum]
                                               Equisetum variegatum subsp. variegatum
                                                     [Equisetum variegatum var. anceps]
                                               Equisetum variegatum var. variegatum
                                                     [Equisetum variegatum var. anceps]
                                     Hippochaete
                                             Hippochaete variegata