Kingdom Chlorobiota C.Jeffrey ex Doweld (2001) - plants see Subkingdom Viridiplantae Caval.-Sm. (1981)
Count: [*†*] 10p;24c;72o;262f;1685g; †5p;17c;56o;141f;593g
   Subkingdom Pteridobiotina Britton & A. Br. (1896)
  Count: [*†*] 6p;9c;20o;58f;370g; †2p;12c;42o;103f;488g
     Superdivision Cycadophytanae Doweld (2001) see Superphylum Cycadophytanae Doweld (2001)
    Count: [*†*] 5p;5c;9o;12f;83g; †2p;12c;37o;72f;361g
       Division †Pteridospermatophyta Meyen
      Count: [†*] †9c;22o;42f;122g [19 Apr 2023]
         Class †Lyginopteridopsida Novák (1961)
        Count: [†*] †3o;6f;20g [8 Apr 2023]
           Order †Callistophytales Rothwell (1981)
          Count: [†*] †2f;8g [8 Apr 2023]
             1 Family †Callistophytaceae Stidd & J.W.Hall (1970), nom. cons. prop.
            Count: [†*] †6g [8 Apr 2023]
             2 Family †Cornucarpaceae Doweld (2001)
            Count: [†*] †2g [8 Apr 2023]