organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Domain Eukaryota Chatton, 1925 - eukaryotes
     Kingdom Plantae Haeckel (1866) - plants
       Subkingdom Viridaeplantae Cavalier-Sm. (1981) - green plants see [unranked] Viridiplantae Cavalier-Smith, 1981
         Land plants
           Other Gymnosperms see Class Spermatopsida
             a Order †Gigantopteridales X.X.Li & Z.Q. Yao (1983)
             b Order †Vojnovskyales Neub. (1955)
             c Order †Czekanowskiales Novák (1972)
             d Order †Iraniales H.-J.Schweitz. see Order Czekanowskiales Novák (1972)
             e Order †Pentoxylales Pilg. & Melchior (1954)
             f Order †Hermanophytales
             g Order Gnetales Mart. (1835)
             h Family †Dirhopalostachyaceae see Family Nilssoniaceae Ziegensp. (1925)