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 Loxogrammoideae H.Schneid. (2011) 1 Genus Dictymia J.Sm. (1846) 2 Genus Loxogramme (Blume) C.Presl (1836)