List of ferns and fern allies of Great Britain and Ireland

'' (northern clubmoss) ===Order Lycopodiales=== ====Family Lycopodiaceae (clubmosses)==== ===Order Selaginellales=== ====Family Selaginellaceae (spikemosses)==== ===Order Isoetales=== ====Family Isoetaceae (quillworts)==== '' (lake quillwort or Merlin's grass) ==Class Polypodiopsida (ferns)==

===Order Equisetales=== ====Family Equisetaceae (horsetails)==== ===Order Ophioglossales=== ====Family Ophioglossaceae (adder's-tongues)==== ===Order Osmundales=== ====Family Osmundaceae (royal ferns)==== ===Order Polypodiales (polypod ferns, cathetogyrates)=== ====Family Pteridaceae (maidenhair fern family)==== ====Family Hymenophyllaceae (filmy ferns, bristle ferns)==== ====Family Polypodiaceae==== ====Family Dennstaedtiaceae (bracken family)==== ====Family Thelypteridaceae (marsh ferns)==== ====Family Aspleniaceae (spleenworts)==== ====Family Woodsiaceae (cliff ferns)==== ====Family Dryopteridaceae (wood ferns)==== ===Order Salviniales === ====Family Marsileaceae (pepperworts)==== ====Family Salviniaceae==== ===Order Cyatheales (tree ferns etc.) === ====Family Dicksoniaceae==== ====Family Blechnaceae==== ==See also==