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Ferns and Horsetails (Monilophytes)
Clubmosses and Quillworts (Lycophytes)
Bladder Ferns

Mostly small, deciduous ferns. Rhizome in some species is long with leaves arising singly; in others it is short with leaves in tufts; leaves 2-4 pinnate, thin, delicate; sori rounded; indusium present, flap-like, curling back to expose sporangia as it matures.

About 20 species worldwide, in temperate zones and mountainous areas of the tropics. 4 species in Britain, 2 in Ireland. Another species, C. alpina, was last recorded in Britain in the early 20th century.
Cystopteris diaphana Diaphanous Bladder Fern Cystopteris diaphana thumbnail, link to C. diaphana page
Cystopteris dickieana Dickie's Bladder Fern Cystopteris dickieana thumbnail, link to C. dickieana page
Cystopteris fragilis Brittle Bladder Fern Cystopteris fragilis thumbnail, link to C. fragilis page
Cystopteris montana Mountain Bladder Fern Cystopteris montana thumbnail, link to C. montana page
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