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 Gentianales Juss. ex Bercht. & J.Presl (1820)
                       1 Family Gelsemiaceae Struwe & V.A.Albert (1995)
                       2 Family Loganiaceae R.Br. ex Mart. (1827), nom. cons. - butterfly-bush family
                       3 Family Strychnaceae DC. ex Perleb (1818) see Tribe Strychneae
                       4 Family Antoniaceae Hutch. (1959) see Tribe Antonieae Endl. (1838)
                       5 Family Spigeliaceae Mart. (1827) see Tribe Spigelieae
                       6 Family Emblingiaceae Airy Shaw (1965)
                       7 Family Gentianaceae Juss. (1789), nom. cons. - gentian family
                       8 Family Saccifoliaceae Maguire & Pires (1978) - Saccifolium family see Tribe Saccifolieae (Maguire & Pires) L. Struwe et al., in L. Struwe & V.A.Albert (2002)
                       9 Family Geniostomaceae Struwe & V.A.Albert (1995) see Tribe Loganieae Kitt. (1840)