[plants] Haeckel (1866) - plants
   vascular plants see Phylum Tracheophyta Sinnott ex Caval.-Sm. (1998)
     euphyllophytes see Clade Euphyllophyta Lecointre & Le Guyader 2006 [Cantino & Donoghue 2020]
       Spermatophyta Britton & Brown 1896 [Crane & Kenrick 1997], nom. cl. inval. - seed plants see Clade Spermatophyta Britton & Brown 1896 [Cantino, Doyle & Donoghue 2020]
         Class Magnoliopsida Brongn. (1843)
           "Eudicots" see Clade Eudicotyledoneae Donoghue, Doyle & Cantino 2007 [Donoghue, Doyle & Cantino 2020]
             "Core Eudicots" see Clade Gunneridae Soltis, Soltis & Judd 2007 [Soltis, Soltis & Judd 2020]
               Rosidae Takht. (1967) see Superorder Rosanae Takht. (1967)
                 Fabids see Clade Fabidae Judd, Soltis & Soltis 2007 [Judd, Soltis, Soltis & Cantino 2020]
                   Order Fagales Engl. (1892)
                     Family Fagaceae Dumort. (1829), nom. cons. - beech family
                       Subfamily Quercoideae
                         1 Genus Castanea Mill. (1754) - chestnut trees
                         2 Genus Castanopsis (D.Don) Spach (1841), nom. cons.
                         3 Genus Chrysolepis Hjelmqvist (1948)
                         4 Genus Lithocarpus Blume (1825-1826)
                         5 Genus Quercus L. (1753) - oak
                         6 Genus Trigonobalanus Forman (1962)