Kingdom Chlorobiota C.Jeffrey ex Doweld (2001) - plants see Subkingdom Viridiplantae Caval.-Sm. (1981)
   Subkingdom Lycopodiobiotina Doweld (2001)
     Division †Rhyniophyta Cronquist, Takht. & Zimmerm. (1966) see Phylum Rhyniophyta Cronquist, Takht. & Zimmerm. (1966)
       Class †Trimerophytopsida A.S.Foster & Gifford (1974) [monotypic]
         Order †Trimerophytales Kasper, H.N. Andrews & W.H. Forbes (1974) [monotypic]
           1 Family †Trimerophytaceae Bierhorst (1971)