Polypodiopsida (426)
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 Adiantaceae (61) Aspidiaceae (32) Aspleniaceae (46) Athyriaceae (12) Blechnaceae (2) Cyatheaceae (11) Davalliaceae (11) Dennstaedtiaceae (68) Dicksoniaceae (2) Dipteridaceae (1) | Dipteridaceae (1) Dryopteridaceae (1) Gleicheniaceae (4) Hymenophyllaceae (3) Onocleaceae (1) Osmundaceae (9) Parkeriaceae (1) Polypodiaceae (112) Pteridaceae (42) Thelypteridaceae (4) Vittariaceae (1) |
 Alternation of Generations in Ferns   - Photographic study by Anne Bruce of fern reproduction with fine macroscopic and microscopic images. - http://www.microscopy-uk.org.uk/mag/artmay00/altern.html    |
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