1) Family pteridaceae 2) Fern family 
Pteridaceae is a large family of ferns in the order Polypodiales. Members of the family have creeping or erect rhizomes and are mostly terrestrial or epipetric (growing on rock). The leaves are almost always compound and have linear sori that are typically on the margins of the leaves and lack a true indusium, typically being protected by a false ...
one of several families in the fern order Filicales. It consists of about 60 genera with 850 species and is distributed throughout the world, ... [2 related articles]
[n] - one of a number of families into which the family Polypodiaceae has been subdivided in some classification systems
family Pteridaceae noun one of a number of families into which the family Polypodiaceae has been subdivided in some classification systems; Pteridaceae is itself in turn sometimes further subdivided