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 Lycopodiobiotina Doweld (2001)
  Count: [*†*] 1p;2c;3o;3f;6g; †3p;5c;14o;38f;105g [2 Mar 2023]
     Division †Rhyniophyta Cronquist, Takht. & Zimmerm. (1966) see Phylum Rhyniophyta Cronquist, Takht. & Zimmerm. (1966)
    Count: [†*] †2c;5o;6f;18g [26 Jan 2023]
       Class †Trimerophytopsida A.S.Foster & Gifford (1974) [monotypic]
      Count: [†*] †1o;1f;6g [26 Jan 2023]
         Order †Trimerophytales Kasper, H.N. Andrews & W.H. Forbes (1974) [monotypic]
        Count: [†*] †1f;6g [26 Jan 2023]
           Family †Trimerophytaceae Bierhorst (1971)
          Count: [†*] †6g [26 Jan 2023]
             Genus †Oocampsa H.N. Andrews, Gensel & Kasper (1975)
            Count: -