[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 Betulaceae Gray (1822), nom. cons. - birch family
                       Subfamily Coryloideae (Mirb., 1815) Hook.f. (1870)
                         1 Genus Carpinus L. (1753)
                         2 Genus Corylus L. (1753)
                         3 Genus Ostrya Scopoli (1760), nom. cons.
                         4 Genus Ostryopsis Decaisne (1873)