1) Family gleicheniaceae 2) Fern family 
The Triassic Antarctipteris and Gleichenipteris are sometimes ascribed to the Gleicheniaceae, but are probably better considered Gleicheniales incertae sedis. The two living subfamilies contain six genera: Subfamily Gleichenioideae Subfamily Stromatopteridaeae ==Footnotes== ...
(from the article `fern`) ...a family of psilotophytes, but most consider it related to the fern family Gleicheniaceae; 1 genus and species, Stromatopteris moniliformis.Family ...
[n] - a family of ferns belonging to order Filicales