Welcome to Grammitid Ferns of the World

Grammitid Ferns of the World is a tool for generating and disseminating biodiversity information. The grammitid ferns are a monophyletic group of about 750 species, comprising about one half of the total diversity in the Polypodiaceae. Grammitids are distributed world-wide, primarily growing as epiphytes in humid forests of the tropics.