Domain Eucaryota
   Subdomain Chlorota Doweld (2001)
     Kingdom Chlorobiota C.Jeffrey ex Doweld (2001) - plants see Subkingdom Viridiplantae Caval.-Sm. (1981)
       Subkingdom Pteridobiotina Britton & A. Br. (1896)
         Superphylum Cycadophytanae Doweld (2001)
           Phylum Pinophyta Cronquist, Takht. & Zimmerm. ex Reveal (1996) see Class Pinopsida Burnett (1835)
             Class Pinopsida Burnett (1835)
               Subclass Cupressidae Doweld (2001)
                 Order Actinostrobales Doweld (2001)
                   Family Widdringtoniaceae Doweld (2001) [monotypic]
                     Genus Widdringtonia Endl. (1842)