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
           Phylum †Progymnospermophyta Lang (1925) - progymnosperms see Class Progymnospermopsida Beck (1960)
             a Order †Archaeopteridales W.Zimm. (1930)
             b Order †Aneurophytales Beck (1957)
             c Order †Protopityales Walton (1957)
             d ?†noeggerathians