1 Family Schizaeaceae Kaulf. (1827) 2 Family Hymenophyllaceae Mart. (1835) - filmy ferns 3 Family Dicksoniaceae M.R.Schomb. (1848), nom. cons. - dicksonioids 4 Family Cyatheaceae Kaulf. (1827) - scaly tree ferns 5 Family Polypodiaceae J.Presl & C.Presl (1822) - polygrams 6 Family Parkeriaceae Hook. (1825) see Subfamily Parkerioideae Burnett (1835)