angiosperms - flowering plants see Subclass Magnoliidae Novák ex Takht. (1967)
   monocots see Clade Monocotyledoneae de Candolle 1817 [Judd, Soltis, Soltis & Graham 2020]
     commelinoids
       Order Poales Burnett (1835) - grasses
         01 Family Anarthriaceae D.F.Cutler & Airy Shaw (1965) see Family Restionaceae R.Br. (1810), nom. cons.
         02 Family Centrolepidaceae Endl. (1836), nom. cons. - Centrolepis family see Family Restionaceae R.Br. (1810), nom. cons.
         03 Family Cyperaceae Juss. (1789), nom. cons. - sedge family
         04 Family Ecdeiocoleaceae D.F.Cutler & Airy Shaw (1965)
         05 Family Eriocaulaceae Martinov (1820), nom. cons. - pipewort family
         06 Family Flagellariaceae Dumort. (1829), nom. cons. - Flagellaria family
         07 Family Hydatellaceae U.Hamann (1976)
         08 Family Joinvilleaceae Toml. & A.C.Sm. (1970)
         09 Family Juncaceae Juss. (1789), nom. cons. - rush family
         10 Family Poaceae Barnhart (1895), nom. cons. - grass family
         11 Family Prioniaceae S. Munro & H. Linder (1998) see Family Thurniaceae Engl. (1907), nom. cons.
         12 Family Restionaceae R.Br. (1810), nom. cons. - Restio family
         13 Family Sparganiaceae Hanin (1811), nom. cons. - bur-reed family see Family Typhaceae Juss. (1789), nom. cons.
         14 Family Thurniaceae Engl. (1907), nom. cons. - Thurnia family
         15 Family Typhaceae Juss. (1789), nom. cons. - cat-tail family
         16 Family Xyridaceae C.Agardh (1823), nom. cons. - yellow-eyed grass family