Belongs within: Polypodiales.Contains: Cheilanthes, Vittariaceae, Adiantum, Pteris. The Pteridaceae is a cosmopolitan family of ferns with abaxial sori lacking indusia or protected by a reflexed or revolute leaf margin (M. D. Windham). The molecular phylogenetic analysis of ferns by Schneider et al. (2004) suggested that the Pteridaceae may be paraphyletic with regard to the Vittariaceae.… Continue reading Pteridaceae