Links to genera Ferns and Horsetails (Monilophytes) Clubmosses and Quillworts (Lycophytes)
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| Pteridium | Bracken
Rhizomes extensive, subterranean, creeping, scaleless, hairy. Fronds arising singly; blades 2-4 pinnate; sori almost continuous along margins of pinnules, enclosed by rolled-under leaf margin; margins of infertile leaves also rolled under.
Worldwide distribution; previously thought to be just one species; number of species and subspecies under active research. One species in Britain with at least one highly distinct subspecies.
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