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 Theidae Doweld (2001)
                   Superorder Primulanae R.Dahlgren ex Reveal (1996) see Order Ericales Bercht. & J.Presl (1820)
                     Order Primulales Dumort. (1829) see Order Ericales Bercht. & J.Presl (1820)
                       Family Theophrastaceae G.Don (1835), nom. cons. - Theophrasta family see Subfamily Theophrastoideae (Bartl.) A.DC. (1844)