Pteridophyta

• Asplenium Subgenus Ceterach  - Presents a study of the phylogenetic relationships among 20 taxa of the fern genus in this paper, entitled "Phylogenetic analysis of Asplenium subgenus Ceterach (Pteridophyta: Aspleniaceae) based on plastid and nuclear ribosomal ITS DNA sequences.".
• BioImages: Pteridophyta (Ferns and Allies)  - Shares images, by subtaxa; identification works; and general references for this phylum.
• Division Pteridophyta  - Information on the distinguishing features of the two families of this vascular plant.
• Neotropical Herbarium Specimens Pteridophyta  - Offers thumbnail images of some species of this plant group.
• Photo Gallery Wildlife Pictures Plants b  - Presents access to images of member species.
• PinkMonkey Online Study Guide-Biology Pteridophyta  - Information on the distinguishing characteristics of this plant group.
• Plant Inventory Ferns  - Information on the five species of this plant group identified at Hilton Pond Center for Piedmont Natural History. With access to images.
• Plants Pteridophyta of Europe Photo Gallery  - Provides access to a collection of images of this plant group.
• Pteridophyta Ferns - Farne  - Offers various images of this plant group.
• Red Book Pteridophyta  - Provides information on this plant group. Includes the three families of primitive ferns.
• Tropicos Image List for Pteridophyta  - Provides access to a collection of images of member species of this plant group.