Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         [crown] Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
           Clade "neomura" Cavalier-Smith 1987
             Domain Eukaryota Chatton, 1925 - eukaryotes
               Clade neokaryotes Cavalier-Smith 1993 - mitochondrial eukaryotes
                 Clade neozoa Cavalier-Smith 1993
                   Superkingdom Corticata Lankester, 1878
                     Kingdom Plantae Haeckel (1866) - plants
                       Subkingdom Viridiplantae Caval.-Sm. (1981) - green plants
                         Infrakingdom Streptophyta C. Jeffrey (1967)
                           Superphylum Embryophyta Crane et al. (2004)
                             "polysporangiophytes"
                               Phylum Tracheophyta Sinnott ex Caval.-Sm. (1998) - vascular plants
                                 Subphylum Euphyllophytina
                                   Infraphylum "Radiatopses" Kenrick & Crane (1997)
                                     "lignophytes"
                                       Class Spermatopsida
                                         "core seed plants"
                                           Subclass Magnoliidae Novák ex Takht. (1967) - angiosperms
                                             "core angiosperms"
                                               "eudicots"
                                                 "core eudicots"
                                                   Superorder Asteranae Takht. (1967)
                                                     "lamiids"
                                                       Order Gentianales Juss. ex Bercht. & J. Presl (1820)
                                                         Family Gentianaceaeᵀ Juss. (1789) - gentian family
                                                           Tribe Saccifolieae (Maguire & Pires) L. Struwe et al., in L. Struwe & V.A. Albert (2002)
                                                             1 Genus Curtia Chamisso & D.F.L. Schlechtendal (1826)
                                                             2 Genus Hockinia G. Gardner (1843) [monotypic]
                                                             3 Genus Saccifoliumᵀ B. Maguire & J.M. Pires, in B. Maguire et al. (1978) [monotypic]
                                                             4 Genus Tapeinostemon Bentham (1854)
                                                             5 Genus Voyriella Miquel (1851)