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Next to the flowering plants, the leptosporangiate ferns are the most diverse group of living land plants. Estimates place their diversity at about 12,000 species in around 300 genera. This page is part of the tree of life phylogeny project.
Information on the biology and cultivation of ferns; activities of the society including a spore exchange and publication of Fiddlehead Forum, American Fern Journal, and Pteridologia.