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 Lamiidae Takht. ex Reveal (1993) see [unranked] lamiids
                   Superorder Gentiananae Thorne ex Reveal (1992) see Order Gentianales Juss. ex Bercht. & J.Presl (1820)
                     Order Rubiales Dumort. (1829) see Order Gentianales Juss. ex Bercht. & J.Presl (1820)
                       Family Rubiaceae Juss. (1789), nom. cons. - coffee family