Thelypteridaceae is a family of about 900 species of ferns in the eupolypods II clade of the order Polypodiales, in the class Polypodiopsida. The ferns are terrestrial, with the exception of a few which are lithophytes (grow on rocks). The bulk of the species are tropical, although there are a number of temperate species. These ferns typically hav... Found on http://en.wikipedia.org/wiki/Thelypteridaceae