La historia de la planta llamada helecho el texto largo con pakabras cencillas y en ingles
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Ferns are vascular seedless plants whose most outstanding morphological characteristics are their large leaves, usually pinnate and with circinate prefoliation. Traditionally it has grouped into 3 groupsː the maratial and ophioglossal leptosporangiate ferns, however, modern genetic analysis found that the ophioglossals are related to the psilotals, which historically were classified apart as they were considered primitive, now grouping together in a single taxon called Ophioglossidae or Psilotopsida. They can present sori for reproduction. The monophyletic nature of ferns has been questioned by several authors due to the results of the first molecular phylogenetic analyzes; however, they have been shown to form a sister clade to horsetails based on plastid, nuclear, and mitochondrial genetics. Traditionally they have been grouped into two groups on the basis of the structure and development of the sporangia: maratiales and ofioglossales are called together "eusporangiate ferns" (but equisetos and psilots are also eusporangiate), and polypodids are called "leptosporangiate ferns. "; although the phylogenetic analyzes determined that the eusporangiates are actually a paraphyletic group in relation to the leptosporangiates.