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Ferns The ferns are an ancient lineage of plants, dating back to at least the Devonian. They include three living groups -- Marattiales, Ophioglossales and leptosporangiate ferns-- as well as a couple of extinct groups. An additional group, the Psilotales, is tentatively included in the ferns, though the group is so vastly different from living ferns that no one is really certain of its relationships.
Cyathea cooperi(ferns) Excerpt from www.ucmp.berkeley.edu Photo : Courtesy of http://krolikudaff.com |
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