Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
           "neomura" Cavalier-Smith 1987
             Domain Eukaryota Chatton, 1925 - eukaryotes
               neokaryotes Cavalier-Smith 1993 - mitochondrial eukaryotes
                 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
                             "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 Rubiaceae Juss. (1789) - coffee family
                                                           Subfamily Ixoroideae
                                                             Tribe Coffeeae DC. (1807)
                                                               1.1 Genus Coffeaᵀ L. (1753)
                                                               1.2 Genus Psilanthus Hook. f., 1873, nom. cons.
                                                               2 Genus Tricalysia A. Richard ex A.P. de Candolle (1830)