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 Magnoliophyta Cronquist, Takht. & Zimmerm. ex Reveal (1996) see Infraphylum Angiospermae auct.
             Subphylum Magnoliophytina Reveal (1996)
               Class Magnoliopsida Brongn. (1843)
                 Subclass Rutidae Doweld (2001)
                   Superorder Burseranae Doweld (2001)
                     Order Nitrariales Doweld (2001), nom. inval.
                       1 Family Peganaceae Takht. ex Doweld (2001), nom. inval. [monotypic] see Family Peganaceae Tiegh. ex Takht. (1987)
                       2 Family Nitrariaceae Lindl. (1830)
                       3 Family Tetradiclidaceae Takht. ex Doweld (2001), nom. inval. [monotypic] see Family Tetradiclidaceae Takht. (1986)