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Ferns. Kaiti Xouris, Preston Hickson,Taylor Contini, Nelly Kruglyak. Origins. Phylum: Pterophyta – consists of about 11,000 species Lower Devonian Tropical Biome All but dry land. Evolution of the Fern.

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Kaiti Xouris, Preston Hickson,Taylor Contini, Nelly Kruglyak

  • Phylum: Pterophyta – consists of about 11,000 species
  • Lower Devonian
  • Tropical Biome
  • All but dry land
evolution of the fern
Evolution of the Fern
  • Some botanists believe that the ferns are descendants of the Rhyniopsida, an extinct group of free-sporing plants.
  • Originated in the Silurian period (about 430 million years ago) and went extinct in the mid-Devonian period (about 370 million years ago).
  • ferns were the first plants to have megaphylls. Megaphyll: a leaf with a complex system of branched veins.
  • It is believed by botanists that ferns developed megaphylls by developing a flattened and webbed version of the simple, three-dimensional branching system of the Rhyniopsida. The evolution of the megaphyll was a major event in plant evolution
  • Almost all major types of plants now possess megaphylls.
life cycle
Life Cycle




  • Starts as 2n sporophyte
  • Sporangia is created to go through meiosis to create a haploid cell
  • sporangia grouped together in clusters called sori (sorus, singular) on the undersides of the leaves
health benefits of ferns
Health Benefits of Ferns
  • Maidenhair ferns: used to make cough syrups.
  • Oak fern: aides arthritis as well as respiratory problems.
  • Wall rue: grows in rock crevices, thought to cure swollen glands,
  • Some ferns have been used to cure certain snake bites.
fern habitats
Fern Habitats
  • Some Ferns have adapted to dry habitats.
  • The majority of the species prefer wet and shady climates for optimal growth and development.

Asplenium platyneuron

Athyrium filix-femina var. angustum


Onoclea sensibilis

Polystichum acrostichoides

  • Gametophyte is independent from the sporophyte
  • Sporophyte is dependant on the Gametophyte.
  • The gametophyte has the ability to grow individually and independently from the sporophyte,
  • It is impossible for the sporophyte to grow as a singular unit.
  • http://images.wildmadagascar.org/pictures/masoala/tree_ferns_bromeliads_0.JPG
  • http://hcs.osu.edu/hcs300/svp2.htm
  • http://www.utm.edu/departments/cens/biology/rirwin/pterophyta.htm
  • http://science.jrank.org/pages/2685/Ferns-Evolution.html
  • http://8e.devbio.com/images/ch20/01.PLC.02.thumb.jpg
  • http://www.arthurhaines.com/Florae_Novae_Angliae/Polypodiaceae/Asplenium-platyneuron-sori.jpg
  • http://www.biol.vt.edu/digital_atlas/media/images/plants/originals/Athyrium_filix-femina_var_asplenioides2%23835c%23.jpg
  • http://www.ct-botanical-society.org/ferns/fernpics/onocleasens_frond.jpg
  • http://gcuonline.georgian.edu/gross/biodiversity/phylum.htm
  • http://www.clintonnaturecenter.org/Christmasfernsori052307.jpg