Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         [crown] Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
           Clade neomura Cavalier-Smith, 1987
             Domain Eukaryota Chatton, 1925 - eukaryotes
               Clade discaria Cavalier-Smith, 2021
                 Clade natates Cavalier-Smith, 2021
                   Clade photaria Cavalier-Smith, 2021
                     Clade eucorta Cavalier-Smith, 2021
                       Superkingdom Corticata Lankester, 1878 - corticates
                         Kingdom Plantae Haeckel (1866) - plants
                           Subkingdom Viridiplantae Caval.-Sm. (1981) - green plants
                             Infrakingdom Streptophyta Caval.-Sm. (1993)
                               [crown] Clade Phragmoplastophyta Lecointre & Le Guyader 2006 [Hall, McCourt, Delwiche, Mishler & Karol 2020]
                                 [crown] Clade Embryophytaᵀ Engler 1887 [Mishler & Qiu 2020]
                                   Clade Pan-Tracheophytaᵀ Cantino & Donoghue 2007 [Cantino & Donoghue 2020]
                                     Clade Apo-Tracheophytaᵀ Cantino & Donoghue 2007 [Cantino & Donoghue 2020]
                                       [crown] Phylum Tracheophytaᵀ Sinnott ex Caval.-Sm. (1998) - vascular plants
                                         Clade Pan-Euphyllophytaᵀ Cantino & Donoghue 2007 [Cantino & Donoghue 2020]
                                           [crown] Clade Euphyllophytaᵀ Lecointre & Le Guyader 2006 [Cantino & Donoghue 2020]
                                             Subphylum Polypodiophytinaᵀ Reveal (1996) [monotypic]
                                               Class Polypodiopsidaᵀ Cronquist, Takht. & Zimmerm. (1966) - ferns
                                                 Subclass Equisetidae Warm. (1883)
                                                   Order Equisetalesᵀ DC. ex Bercht. & J.Presl (1829)
                                                     Family Equisetaceaeᵀ Michx. ex DC. (1804) - horsetails
                                                       Genus Equisetumᵀ L. (1753)
                                                         Equisetum arvense L. - field horsetail
                                                         Equisetum fluviatileᵀ L. (1753) - water horsetail
                                                         Equisetum giganteum L. (1759)
                                                         Equisetum hyemale L. - horsetail
                                                         Equisetum ×litorale Kühlew. ex Rupr. (pro sp.)
                                                         Equisetum ×moorei Newman
                                                         Equisetum myriochaetum Schltdl. & Cham. (1830)
                                                         Equisetum palustre L. - marsh horsetail
                                                         Equisetum ramosissimum Desf. - branched scouringrush
                                                         Equisetum schaffneri Milde (1861)
                                                         Equisetum scirpoides Michx. (1803) - dwarf scouringrush
                                                         Equisetum sylvaticum L. - woodland horsetail
                                                         Equisetum telmateia Ehrh. (1783) - giant horsetail
                                                         Equisetum ×trachyodon A.Braun
                                                         Equisetum variegatum Weber - variegated horsetail
                                                         1 Subgenus Equisetum subg. Equisetumᵀ
                                                         2 Subgenus Equisetum subg. Hippochaete