Phylum [Tracheophyta] Sinnott ex Caval.-Sm. (1998) - vascular plants
   Subphylum Polypodiophytina Reveal (1996) [monotypic]
     Class Polypodiopsida Cronquist, Takht. & Zimmerm. (1966) - ferns
       Subclass Polypodiidae Cronquist, Takht. & Zimmerm. (1966)
         Order Polypodiales Link (1833) - cathetogyrates
           (eupolypods)
             Suborder Polypodiineae Dumort. (1829)
               Family Polypodiaceae J.Presl & C.Presl (1822) - polygrams
                 Subfamily Grammitidoideae Parris & Sundue (2016) see [unranked] grammitids
                   01 Genus Acrosorus Copel. (1906)
                   02 Genus Adenophorus Gaudich. (1824)
                   03 Genus Alansmia M. Kessler, A.L.M. Velázquez, M. Sundue & P.H. Labiak (2011)
                   04 Genus Archigrammitis B.S. Parris (2013)
                   05 Genus Ascogrammitis M.A. Sundue (2010)
                   06 Genus Calymmodon C.Presl (1836)
                   07 Genus Ceradenia L.E.Bishop (1988)
                   08 Genus Chrysogrammitis Parris
                   09 Genus Cochlidium Kaulf. (1820)
                   10 Genus Ctenopterella Parris
                   11 Genus Dasygrammitis Parris
                   12 Genus Enterosora Baker
                   13 Genus Galactodenia M. Sundue & P.H. Labiak (2012)
                   14 Genus Grammitis Sw. (1801)
                   15 Genus Lellingeria A.R.Sm. & R.C.Moran
                   16 Genus Leucotrichum Labiak
                   17 Genus Lomaphlebia J.Sm. (1875)
                   18 Genus Luisma M.T.Murillo & A.R.Sm.
                   19 Genus Melpomene A.R.Sm. & R.C.Moran (1992)
                   20 Genus Micropolypodium Hayata
                   21 Genus Moranopteris R.Y. Hirai & J. Prado (2011)
                   22 Genus Mycopteris M. Sundue (2013)
                   23 Genus Notogrammitis L.R. Parris in L.R. Parris & B.S. Parris (2012)
                   24 Genus Oreogrammitis Copel. (1917)
                   25 Genus Prosaptia C.Presl (1836)
                   26 Genus Radiogrammitis Parris
                   27 Genus Scleroglossum Alderw. (1912)
                   28 Genus Stenogrammitis P.H. Labiak (2011)
                   29 Genus Terpsichore A.R.Sm.
                   30 Genus Themelium (T.Moore) Parris
                   31 Genus Tomophyllum (E.Fourn.) Parris
                   32 Genus Xiphopterella Parris
                   33 Genus Zygophlebia L.E.Bishop (1989)