- American Fern Society
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.
- British Fern Species
Seachable database.
- Ferns Around Washington, DC
A collection of images and information on ferns growing in the DC area.
- Ferns et al of New England and Bermuda
Lists all native pteridophyte species and some hybrids, with photographs of most and data pages for some.
- Ferns of Barbados
Checklist plus distribution data and links for each species.
- Ferns of Fern Forest and South Florida
Photographs and descriptions of the ferns of southern Florida.
- Ferns of Great Britain and Ireland
Small images of 39 antique prints by Thomas Moore, 1855.
- Ferns of the Canberra Region
A site about ferns in southeastern Australia, their ecology, how to grow them, information on ferns in general, with numerous photographs.
- Filicopsida
Introduction to ferns from the Tree of Life project.
- Gallery of Connecticut Ferns
Photos and brief information indexed by common and scientific names.
- Introduction to the Ferns
The ferns are an ancient lineage of plants, dating back to at least the Devonian. They include three living groups - Marattiales, Ophioglossales, and leptosporangiate ferns - as well as a couple of extinct groups.
- Leptosporangiate Ferns
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.
- Phylum Pterophyta
Includes a description of the fern life cycle, list of families and genera, and links to images of selected representatives.
- Pterophyta
Introduction to the systematics of the ferns, with family descriptions and images.
- Pterophyta Taxa
List of all families and genera, with numbers of species and ranges.
- Recent pteridophyte name changes
Refers to Australian taxa and mainly changes effected in the 1990s.
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