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Ferns

Pteridophyta

Summary 6

Pteridophytes or Pteridophyta, in the broad interpretation of the term (or sensu lato), are vascular plants (plants with xylem and phloem) that reproduce and disperse via spores. Because they produce neither flowers nor seeds, they are referred to as cryptogams. The group includes ferns, horsetails, clubmosses, spikemosses and quillworts. These do not form a monophyletic group, because ferns and horsetails are more closely related to seed plants than to lycophytes (clubmosses, spikemosses and quillworts). Therefore, pteridophytes...

Pteridophyte life cycle 7

Just like with seed plants and mosses, the life cycle of pteridophytes involves alternation of generations. This means that a diploid generation (the sporophyte, which produces spores) is followed by a haploid generation (the gametophyte or prothallus, which produces gametes). Pteridophytes differ from mosses and seed plants in that both generations are independent and free-living, although the sporophyte is generally much larger and more conspicuous. The sexuality of pteridophyte gametophytes can be classified as follows:

These terms are not the same as monoecious and dioecious, which refer to whether a seed plant sporophyte bears both male and female gametophytes (i.e. produces both pollen and seeds), or just one of the sexes.

Known predators 8

Tracheobionta (vascular plants) is prey of:
herbivorous vertebrate harvesters
Testudines
Actinopterygii
Anseriformes
Muridae
Odocoileus
Sylvilagus palustris

Based on studies in:
USA: Texas (Lake or pond)
USA: Florida, South Florida (Swamp)

This list may not be complete but is based on published studies.

Fuentes y créditos

  1. (c) Garuna bor-bor, algunos derechos reservados (CC BY-SA), http://www.flickr.com/photos/garunaborbor/5115934526/
  2. (c) Cássio Abreu, algunos derechos reservados (CC BY), http://www.flickr.com/photos/psicodrops/3162661727/
  3. (c) J Brew, algunos derechos reservados (CC BY-SA), subido por J Brew, http://www.flickr.com/photos/brewbooks/257636548/
  4. (c) J Brew, algunos derechos reservados (CC BY-NC-SA), http://www.flickr.com/photos/93452909@N00/305884315
  5. (c) J Brew, algunos derechos reservados (CC BY-NC-SA), subido por J Brew, http://www.flickr.com/photos/93452909@N00/373244009
  6. Adaptado por Gabby Padilla del trabajo de (c) Wikipedia, algunos derechos reservados (CC BY-SA), http://en.wikipedia.org/wiki/Pteridophyta
  7. (c) Wikipedia, algunos derechos reservados (CC BY-SA), http://en.wikipedia.org/wiki/Pteridophyte
  8. (c) SPIRE project, algunos derechos reservados (CC BY), http://eol.org/data_objects/10540197

Más información

NaturaLista Mapa

Color green
Size small
Leaf parallel
Type vascular
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