Kingdom Chlorobiota C.Jeffrey ex Doweld (2001) - plants see Subkingdom Viridiplantae Caval.-Sm. (1981)
Ref: A. Novikoff & B. Barabasz-Krasny, 2015: 23; Count: [*†*] 10p;24c;72o;262f;1685g; †5p;17c;56o;141f;593g
   Subkingdom Lycopodiobiotina Doweld (2001)
  Ref: A. Novikoff & B. Barabasz-Krasny, 2015: 43; Count: [*†*] 1p;2c;3o;3f;6g; †3p;5c;14o;38f;105g [2 Mar 2023]
     Division Lycopodiophyta D.H.Scott (1900) see Phylum Lycopodiophyta D.H.Scott (1900)
    Ref: A. Novikoff & B. Barabasz-Krasny, 2015: 45; Count: [*†*] 2c;3o;3f;6g; †4o;25f;66g [2 Mar 2023]
       Class Isoëtopsida Rolle (1884)
      Ref: A. Novikoff & B. Barabasz-Krasny, 2015: 46; Count: [*†*] 2o;2f;2g; †2o;12f;31g [2 Mar 2023]
         Order †Lepidodendrales Haeckel (1868)
        Ref: A. Novikoff & B. Barabasz-Krasny, 2015: 46; Count: [†*] †6f;21g [1 Mar 2023]
           Family †Spenceritaceae B. Thomas & Brack-Hanes ex Doweld (2001), nom. cons. prop.
          Ref: A. Novikoff & B. Barabasz-Krasny, 2015: 46; Count: [†*] †4g [1 Mar 2023]
             Genus †Spencerites D.H.Scott (1897)
            Ref: A. Novikoff & B. Barabasz-Krasny, 2015: 46; Count: -