angiosperms - flowering plants see Subclass Magnoliidae Novák ex Takht. (1967)
   monocots see Clade Monocotyledoneae de Candolle 1817 [Judd, Soltis, Soltis & Graham 2020]
     commelinids see Clade Commelinidae Takhtajan 1967 [Graham, Saarela & Judd 2020]
       Order Poales Burnett (1835) - grasses
         01 Family Anarthriaceae D.F.Cutler & Airy Shaw (1965) see Family Restionaceae R.Br. (1810), nom. cons.
         02 Family Bromeliaceae Juss. (1789), nom. cons. - bromeliad family
         03 Family Centrolepidaceae Endl. (1836), nom. cons. - Centrolepis family see Family Restionaceae R.Br. (1810), nom. cons.
         04 Family Cyperaceae Juss. (1789), nom. cons. - sedge family
         05 Family Ecdeiocoleaceae D.F.Cutler & Airy Shaw (1965)
         06 Family Eriocaulaceae Martinov (1820), nom. cons. - pipewort family
         07 Family Flagellariaceae Dumort. (1829), nom. cons. - Flagellaria family
         08 Family Hydatellaceae U.Hamann (1976)
         09 Family Joinvilleaceae Toml. & A.C.Sm. (1970)
         10 Family Juncaceae Juss. (1789), nom. cons. - rush family
         11 Family Mayacaceae Kunth (1842), nom. cons. - Mayaca family
         12 Family Poaceae Barnhart (1895), nom. cons. - grass family
         13 Family Rapateaceae Dumort. (1829), nom. cons. - Rapatea family
         14 Family Restionaceae R.Br. (1810), nom. cons. - Restio family
         15 Family Sparganiaceae Hanin (1811), nom. cons. - bur-reed family see Family Typhaceae Juss. (1789), nom. cons.
         16 Family Thurniaceae Engl. (1907), nom. cons. - Thurnia family
         17 Family Typhaceae Juss. (1789), nom. cons. - cat-tail family
         18 Family Xyridaceae C.Agardh (1823), nom. cons. - yellow-eyed grass family