Kingdom Chlorobiota C.Jeffrey ex Doweld (2001) - plants see Subkingdom Viridiplantae Caval.-Sm. (1981)
   Subkingdom Pteridobiotina Britton & A. Br. (1896)
     Superdivision Cycadophytanae Doweld (2001) see Superphylum Cycadophytanae Doweld (2001)
       IX Division †Progymnospermophyta Bold et al. see Phylum Progymnospermophyta Lang (1925)
       X Division †Pteridospermatophyta Meyen
       XI Division Cycadophyta Bessey (1907)
       XII Division Ginkgophyta Bessey (1907) [monotypic] see Phylum Ginkgophyta Bessey (1907)
       XIII Division Gnetophyta Bessey (1907) [monotypic]
       XIV Division Pinophyta Cronquist, Takht. & Zimmerm. ex Reveal (1996) [monotypic]
       XV Division Magnoliophyta Cronquist, Takht. & Zimmerm. ex Reveal (1996)