Phylum Magnoliophyta Cronquist, Takht. & Zimmerm. ex Reveal (1996) see Infraphylum Angiospermae auct.
   Class Magnoliopsida Brongn. (1843)
     Subclass Hamamelididae Takht. (1967)
       Superorder Faganae Takht. (1997) see Order Fagales Engl. (1892)
         Order Corylales Dumort. (1829)
           Family Betulaceae Gray (1822), nom. cons. - birch family
             1 Genus Betula L. (1753) - birches
             2 Genus Alnus Mill. (1754)
             3 Genus Duschekia Opiz see Genus Alnus Mill. (1754)