Members of the Grammitidaceae were recognized by Tryon & Stolze (1993) in the Tribe Grammitideae of the Polypodiaceae. Undoubtedly, Grammitidaceae shares close affinity with Polypodiaceae (Ranker et al., 2004; Schneider et al. 2004), but here is treated as a distinct family. In Peru, the family Grammitidaceae is represented by nine genera and more than 80 species (Tryon & Stolze, 1993; Smith et al., 2005). This family occurs in a vast range of altitudes and environments. Ten species in three genera are recognized as endemics; they are found in the regions of the Humid Montane, and Premontane Forests, between 700 and 2500 m elevation, and also in the Dry and Humid Puna, and High Andean regions above 3900 m elevation. Four endemics are found in five protected areas.