Tags: Fern.
Cystopteridaceae are a family of ferns in the eupolypods II clade of the order Polypodiales class Polypodiopsida. They include four genera: Acystopteris Cystoathyrium Cystopteris and Gymnocarpium. Gymnocarpium and Cystopteris have been found to be sister to the remaining Eupolypods II.Cystopteridaceae are small or medium-sized ferns in forests and crevices. They generally have thin laminae and small round naked sori.
