Phylum Magnoliophyta Cronquist, Takht. & Zimmerm. ex Reveal (1996) see Infraphylum Angiospermae auct.
   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 Gentianaceae Juss. (1789), nom. cons. - gentian family
           6.0 Family Potaliaceae C. Martius (1827) see Tribe Potalieae Rchb. (1837)
           7 Family Saccifoliaceae Maguire & Pires (1978) - Saccifolium family see Tribe Saccifolieae (Maguire & Pires) L. Struwe et al., in L. Struwe & V.A.Albert (2002)
           8 Family Geniostomaceae Struwe & V.A.Albert (1995) see Tribe Loganieae Kitt. (1840)
           9 Family Plocospermataceae Hutch. (1973)