one of a number of families into which Polypodiaceae has been subdivided in some classification systems

Dennstaedtiaceae is the only family of ferns in the order Dennstaedtiales. It includes the world's most abundant fern, Pteridium aquilinum (bracken). Members of the order generally have large, highly divided leaves and have either small, round intramarginal sori with cup-shaped indusia (e.g.