Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         Biota
           "neomura"
             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"
                                                   Order Saxifragales Bercht. & J. Presl (1820)
                                                     1 Family Paeoniaceae Raf. (1815), nom. cons.
                                                     2 Family Cercidiphyllaceae Engl. (1907), nom. cons. - katsura-tree family
                                                     3.1 Family Hamamelidaceae R. Br. (1818), nom. cons. - witch-hazel family
                                                     3.2 Family Altingiaceae Horan. (1841), nom. cons.
                                                     4 Family Daphniphyllaceae Müll.-Arg. (1869), nom. cons. - Daphniphyllum family
                                                     5 Family Peridiscaceae Kuhlm. (1950), nom. cons.
                                                     6.1 Family Iteaceae J. Agardh (1858), nom. cons.
                                                     6.2 Family Grossulariaceae DC. (1805), nom. cons. - currant family
                                                     6.3.1 Family Penthoraceae Rydb. ex Britt. (1901), nom. cons. [monotypic]
                                                     6.3.2 Family Saxifragaceaeᵀ Juss. (1789) - saxifrage family
                                                     6.4 Family Crassulaceae J. St.-Hil. (1805) - stonecrop family
                                                     7 Family Aphanopetalaceae Doweld (2001)
                                                     8.1 Family Tetracarpaeaceae Nakai (1943)
                                                     8.2 Family Haloragaceae R. Br. (1814)