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Topic: Psilotophyta

Related Topics

Psilophyta

Tracheobionta

Vascular plant

Whisk fern

Fern ally

Fern

Homosporous

Spikemoss

Lycopodiophyta

Gnetophyta

Heterosporous

Seed plant

Lycopodiopsida

Ginkgophyta

Pinophyta

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	Psilotophyta -- Facts, Info, and Encyclopedia article (Site not responding. Last check: 2007-10-08)
		Psilotophyta (the "whisk ferns"; also sometimes as Psilophyta) is a ((botany) taxonomic unit of plants corresponding to a phylum) division (i.e., phylum) of the (One of seven biological categories: Monera or Protoctista or Plantae or Fungi or Animalia) Kingdom (The taxonomic kingdom comprising all living or extinct plants) Plantae.
		There has long been controversy about the relationships of the Psilotophyta, with some claiming that they are (Any of numerous flowerless and seedless vascular plants having true roots from a rhizome and fronds that uncurl upward; reproduce by spores) ferns (Pteridophyta), and others maintaining that they are descendants of the first vascular plants.
		Psilotophyta also do not have true ((botany) the usually underground organ that lacks buds or leaves or nodes; absorbs water and mineral salts; usually it anchors the plant to the ground) roots.
	www.absoluteastronomy.com /encyclopedia/p/ps/psilotophyta.htm (375 words)

	Psilotophyta - Wikipedia, the free encyclopedia
		Psilotophyta (the "whisk ferns"; also sometimes as Psilophyta) is a division (i.e., phylum) of the Kingdom Plantae.
		There has long been controversy about the relationships of the Psilotophyta, with some claiming that they are ferns (Pteridophyta), and others maintaining that they are descendants of the first vascular plants.
		Recent evidence from DNA suggests a closer affinity to the ferns.
	en.wikipedia.org /wiki/Psilotophyta (201 words)

	Critical appraisal (from Psilotophyta) -- Encyclopædia Britannica (Site not responding. Last check: 2007-10-08)
		For many years this group was thought to be primitive in its simplicity and related to simple plants of Silurian and Devonian times (438 to 360 million years ago).
		However, the lack of an intervening fossil record and differences in morphology have led botanists to conclude that the Psilotophyta are unrelated to those early vascular plants.
		More results on "Critical appraisal (from Psilotophyta)" when you join.
	www.britannica.com /eb/article-49975?tocId=49975 (834 words)

	Directory - Science: Biology: Flora and Fauna: Plantae: Psilotophyta (Site not responding. Last check: 2007-10-08)
		As with angiosperms, plants of the Psilotophyta have vascular tissue (xylem and phloem), however, they are characterised by the lack of roots, and sometimes the lack of leaves.
		The plants consist of a small, underground, gametophyte, which lacks chlorophyll and has associations with mycorrhizal fungi.
		Classification of Psilotophyta · Main entry in Systema Naturae 2000.
	www.incywincy.com /default?p=27227 (205 words)

	2153template
		Psilotophyta, Microphyllophyta, Equisetophyta, and Pteridophyta), only the members of the Pteridophyta are clearly "
		The sporangia are of two kinds, the characteristics of which can be used to distinguish the two main classes in this division.
		These sporangia are relatively large, sessile or with massive stalks, and contain a large number of spores enclosed by a several layered sporangial wall.
	io.uwinnipeg.ca /~simmons/2153/lb5pg2.htm (275 words)

	Psilotophyta
		Vernacular names of plants within the Division Psilotophyta
		Individual specimen entries are published in the sample database supplied with The Compleat Botanica for species or varieties of this supra-generic taxon.
		For a description of the methodology followed in establishing this hierarchy see the note Nomenclature used in The Compleat Botanica.
	www.crescentbloom.com /plants/Divisio/Psilotophyta.htm (50 words)

	Psilotophyta -- Encyclopædia Britannica (Site not responding. Last check: 2007-10-08)
		Psilotophyta (whisk ferns) is a division represented by two living genera (Psilotum and Tmesipteris) and several species that are restricted to the subtropics.
		This unusual group of small herbaceous plants is characterized by a leafless and rootless body possessing a stem that exhibits a primitive dichotomous type of branching: it forks into equal halves.
		any member of the genus Psilotum in the division Psilotophyta.
	www.britannica.com /eb/article-9110638?tocId=9110638 (229 words)

	Nearctica - Natual History - Plants - Lower Vascular Plants
		This page treats the three lower vascular plant divisions; the Psilotophyta, Lycopodiopsida, and Equisetopyhta.
		The subphylum Psilotophyta (Psilophyta or Psilopsida) represents the most primitive vascular plants.
		These plants arose in the Silurian and Devonian and are characterized by the presence of tracheids, but they lack true roots or leaves.
	www.nearctica.com /nathist/vascular/sphenoph.htm (272 words)

	Psilotophyta Science, Directory (Site not responding. Last check: 2007-10-08)
		Fork Ferns Illustrated introduction to the five species of Psilotaceae found in New Zealand.
		Psilophyta Profusely illustrated description focussed on morphology and evolution.
		Division Psilotophyta Description with links to images of Psilotum nudum and Tmesipteris tannensis.
	www.wacofdn.org /d2RjXzI3MjI3.aspx (85 words)

	Open Directory - Science: Biology: Flora and Fauna: Plantae: Psilotophyta (Site not responding. Last check: 2007-10-08)
		Classification of Psilotophyta - Main entry in Systema Naturae 2000.
		Division Psilotophyta - Description with links to images of Psilotum nudum and Tmesipteris tannensis.
		Fork Ferns - Illustrated introduction to the five species of Psilotaceae found in New Zealand.
	dmoz.org /Science/Biology/Flora_and_Fauna/Plantae/Psilotophyta (162 words)

	Sarah's Internet Directory
		Science: Biology: Flora and Fauna: Plantae: Psilotophyta (20)
		Science: Biology: Flora and Fauna: Plantae: Psilotophyta: Psilotum: Psilotum nudum (16)
		I am a Senior Lecturer in Biology at the University of the West Indies in Barbados.
	www.mayberry.com /cgi-bin/odpv3/index.cgi?base=/profiles/lec.html (256 words)

	Science - Biology - Flora and Fauna - Plantae - Psilotophyta - Newsletter - News - Reviews - Education - Ratings
		Science - Biology - Flora and Fauna - Plantae - Psilotophyta - Newsletter - News - Reviews - Education - Ratings
		Starware search is an excellent resource for quality sites on Psilotophyta and much more!
		Illustrated introduction to the five species of Psilotaceae found in New Zealand.
	www.newsletter-library.com /Science/Biology/Flora_and_Fauna/Plantae/Psilotophyta (123 words)

	The Kingdom of Plants
		In older classifications there was the group Pteridophyta (ferns and fern allies; i.e.
		all spore-bearing tracheophytes) which included Equisetophyta, Filicophyta, Psilotophyta and Lycopodiophyta.
		There was also the group Gymnospermae which included Coniferophyta, Cycadophyta, Ginkgophyta and Gnetophyta.
	www.museums.org.za /bio/plants (249 words)

	Science - Biology - Flora and Fauna - Plantae - Psilotophyta - Psilotum - Newsletter - News - Reviews - Education - ...
		Science - Biology - Flora and Fauna - Plantae - Psilotophyta - Psilotum - Newsletter - News - Reviews - Education - Ratings
		Top : Science : Biology : Flora and Fauna : Plantae : Psilotophyta :
		Starware search is an excellent resource for quality sites on Psilotum and much more!
	www.newsletter-library.com /Science/Biology/Flora_and_Fauna/Plantae/Psilotophyta/Psilotum (60 words)

	Omniseek: /Science & Tech /Biology /Botany /Division Psilotophyta
		Omniseek: /Science & Tech /Biology /Botany /Division Psilotophyta
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		Natural History - Vascular Plants - Main Page VASCULAR PLANTS The phylum Tracheophyta is an extremely large and diverse group and contains almost all of the terrestrial plants, or what people consider plants.
	www.omniseek.com /srch/{47086} (75 words)

	GoForIt.com's Directory - Science: Biology: Flora and Fauna: Plantae: Psilotophyta: Psilotum
		GoForIt.com's Directory - Science: Biology: Flora and Fauna: Plantae: Psilotophyta: Psilotum
		Home > Directory > Science > Biology > Flora and Fauna > Plantae > Psilotophyta > Psilotum (17)
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	search.goforit.com /default?p=27675 (49 words)

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