Phylum Magnoliophyta Cronquist, Takht. & Zimmerm. ex Reveal (1996) see Infraphylum Angiospermae auct.
   Class Liliopsida Batsch (1802) see Class Magnoliopsida Brongn. (1843)
     Subclass Commelinidae Takht. (1967) see Order Commelinales Mirb. ex Bercht. & J.Presl (1820)
       Superorder Poanae Takht. (1997), nom. inval. see Superorder Poanae Takht. ex Reveal & Doweld (1999)
         Order Poales Burnett (1835) - grasses
           Family Poaceae Barnhart (1895), nom. cons. - grass family
             Subfamily Pooideae
               Tribe Triticeae Dumort. (1824)
                 01 Genus Aegilops L. (1753)
                 02 Genus Agropyron Gaertn. (1770) - wheatgrass
                 03 Genus Elymus L. (1753)
                 04 Genus Elytrigia Desv.
                 05 Genus Eremopyrum (Ledebour) Jaubert & Spach (1851)
                 06 Genus Henrardia C.E.Hubb. (1946)
                 07 Genus Hordeum L. (1753) - barley
                 08 Genus Leymus Hochst. (1848)
                 09 Genus Secale L. (1753) - rye
                 10 Genus Triticum L. (1753) - wheat