Salviniales

Salviniales, the Water Ferns
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Marsilea villosa

Marsilea villosa
Scientific classification
Kingdom:Plantae
Division:Pteridophyta
Class:Polypodiopsida
Order:Salviniales
Families


The order Salviniales (formerly known as the Hydropteridales and including the former Marsileales) is an order of ferns in the Division Pteridophyta. They are all aquatic and differ from all other ferns in being heterosporous, meaning that they produce two different types of spores (megaspores and microspores) that develop into two different types of gametophytes (female and male gametophytes, respectively), and in that their gametophytes are endosporic, meaning that they never grow outside the spore wall and cannot become larger than the spores that produced them. In being heterosporus with endosporic gametophytes they are more similar to seed plants than to other ferns.

The ferns of this order vary radically in form from one another and do not look particularly fern-like. Species of the families Azollaceae and Salviniaceae are natant (floating), while those of the family Marsileaceae are rooted. However, the natant species may temporarily grow on wet mud during times of low water, and the Marsileaceae may grow as emergent species, depending on species and location.

There is a well-known fossil member of the Marsileales, Hydropteris (incertae sedis).

References

  • Smith, Alan R., Pryer, Kathleen M., Schuettpelz, E., Korall, P., Schneider, H., Wolf, Paul G. (2006). "A classification for extant ferns". Taxon 55(3): 705-731.
Scientific classification or biological classification is a method by which biologists group and categorize species of organisms. Scientific classification also can be called scientific taxonomy, but should be distinguished from folk taxonomy, which lacks scientific basis.
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Plantae
Haeckel, 1866[1]

Divisions

Green algae
  • Chlorophyta
  • Charophyta
Land plants (embryophytes)
  • Non-vascular land plants (bryophytes)

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FERN

Charity
Founded 1995, The Netherlands
Headquarters Brussels, Belgium and Moreton-in-Marsh, UK

Key people Jutta Kill
Leontien Krul
Iola Leal Riesco
Judith Neyer
Saskia Ozinga
Industry Environmentalism
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Pteridopsida is a class of plants in the Division Pteridophyta that includes all the leptosporangiate ferns.

The classification scheme proposed by Smith et al. (2006; alternative names in brackets):
  • Order Osmundales

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Azollaceae
Wettst.

Genus: Azolla
Lam.

Species

Azolla caroliniana Willd.
Azolla filiculoides Lam.
Azolla japonica Franch. & Sav.
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Marsileaceae
Mirb.

Genera
  • Marsilea L. (45 to 65 species)
  • Pilularia L. (6 species)
  • Regnellidium (1 species)


The Marsileaceae
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Salviniaceae

Genus: Salvinia

species
  • Salvinia auriculata
  • Salvinia biloba
  • Salvinia cucullata
  • Salvinia cyathiformis
  • Salvinia hastata

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FERN

Charity
Founded 1995, The Netherlands
Headquarters Brussels, Belgium and Moreton-in-Marsh, UK

Key people Jutta Kill
Leontien Krul
Iola Leal Riesco
Judith Neyer
Saskia Ozinga
Industry Environmentalism
..... Click the link for more information.
spore is a reproductive structure that is adapted for dispersion and surviving for extended periods of time in unfavorable conditions. Spores form part of the life cycles of many plants, algae, fungi and some protozoans.
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spore is a reproductive structure that is adapted for dispersion and surviving for extended periods of time in unfavorable conditions. Spores form part of the life cycles of many plants, algae, fungi and some protozoans.
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In plants that undergo alternation of generations, a gametophyte is the structure, or phase of life, that contains only half of the total complement of chromosomes:
  • The sporophyte produces spores, in a process called meiosis. These spores develop into a gametophyte.

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Divisions
  • Pinophyta
  • Cycadophyta
  • Ginkgophyta
  • Gnetophyta
  • Magnoliophyta
The spermatophytes (from the Greek word "Σπερματόφυτα") (also known as phanerogams
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FERN

Charity
Founded 1995, The Netherlands
Headquarters Brussels, Belgium and Moreton-in-Marsh, UK

Key people Jutta Kill
Leontien Krul
Iola Leal Riesco
Judith Neyer
Saskia Ozinga
Industry Environmentalism
..... Click the link for more information.
Azollaceae
Wettst.

Genus: Azolla
Lam.

Species

Azolla caroliniana Willd.
Azolla filiculoides Lam.
Azolla japonica Franch. & Sav.
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Salviniaceae

Genus: Salvinia

species
  • Salvinia auriculata
  • Salvinia biloba
  • Salvinia cucullata
  • Salvinia cyathiformis
  • Salvinia hastata

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Marsileaceae
Mirb.

Genera
  • Marsilea L. (45 to 65 species)
  • Pilularia L. (6 species)
  • Regnellidium (1 species)


The Marsileaceae
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For other uses of the term, see Fossil (disambiguation)


FOSSIL is a standard for allowing serial communication for telecommunications programs under the DOS operating system.
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