Cystopteridaceae

Cystopteridaceae
Scientific classification
Kingdom:	Plantae
Division:	Pteridophyta
Class:	Polypodiopsida/Pteridopsida (disputed)
Order:	Polypodiales
(unranked):	Eupolypods II
Family:	Cystopteridaceae (Payer) Schmakov
Genera
Acystopteris Cystopteris Gymnocarpium

Based on recent cladistic evidence, Cystopteridaceae should be construed as a separate family due to its basal position, sister to all other polypodioid ferns. This clade includes only the genera Acystopteris, Cystopteris and Gymnocarpium. Woodsia is a more advanced species.

The ferns in this family generally have thin laminae, and small, round, naked sori.