vascular plants see Phylum Tracheophyta Sinnott ex Caval.-Sm. (1998)
   euphyllophytes see Clade Euphyllophyta Lecointre & Le Guyader 2006 [Cantino & Donoghue 2020]
     monilophytes - ferns see Clade Monilophyta Cantino & Donoghue 2007 [Doyle, Cantino & Donoghue 2020]
       Class Polypodiopsida Cronquist, Takht. & Zimmerm. (1966) - ferns
         core leptosporangiates
           Order Polypodiales Link (1833) - cathetogyrates
             eupolypods
               eupolypods I see Suborder Polypodiineae Dumort. (1829)
                 Family Polypodiaceae J.Presl & C.Presl (1822) - polygrams
                   Genus Kontumia S.K.Wu & P.K.Lôc see Genus Leptochilus Kaulf. (1824)