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Isoetaceae

A Dictionary of Plant Sciences | 1998 | | Copyright

Isoetaceae A family of Pteridophyta, mostly aquatic vascular cryptogams with 2 types of spore (see HETEROSPORY). They have a short, stout, basal stock from which arise the roots below, and a dense rosette of usually tubular, quill-like leaves, which bear the sporangia sunken in their expanded bases. The first leaves of the season produce megasporangia in their bases which contain large megaspores that develop into female gametophytes. Microsporangia are produced in later leaves and contain tiny microspores which develop into minute male gametophytes. There are 2 genera, Isoetes (quillworts), with some 70 species of cosmopolitan distribution, and Stylites, with 1 species in the Peruvian Andes.

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MICHAEL ALLABY. "Isoetaceae." A Dictionary of Plant Sciences. 1998. Encyclopedia.com. 29 May. 2012 <http://www.encyclopedia.com>.

MICHAEL ALLABY. "Isoetaceae." A Dictionary of Plant Sciences. 1998. Encyclopedia.com. (May 29, 2012). http://www.encyclopedia.com/doc/1O7-Isoetaceae.html

MICHAEL ALLABY. "Isoetaceae." A Dictionary of Plant Sciences. 1998. Retrieved May 29, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O7-Isoetaceae.html

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quillwort

The Columbia Encyclopedia, 6th ed. | 2011 | Copyright

quillwort common name for several species of the plant genus Isoetes, which grow in ponds, slow streams, and swampy places. See Lycopodiophyta .

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Isoetes

A Dictionary of Plant Sciences | 1998 | | Copyright

Isoetes (quillworts) See ISOETACEAE.

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MICHAEL ALLABY. "Isoetes." A Dictionary of Plant Sciences. 1998. Encyclopedia.com. 29 May. 2012 <http://www.encyclopedia.com>.

MICHAEL ALLABY. "Isoetes." A Dictionary of Plant Sciences. 1998. Encyclopedia.com. (May 29, 2012). http://www.encyclopedia.com/doc/1O7-Isoetes.html

MICHAEL ALLABY. "Isoetes." A Dictionary of Plant Sciences. 1998. Retrieved May 29, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O7-Isoetes.html

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quillworts

A Dictionary of Plant Sciences | 1998 | | Copyright

quillworts See ISOETACEAE.

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MICHAEL ALLABY. "quillworts." A Dictionary of Plant Sciences. 1998. Encyclopedia.com. 29 May. 2012 <http://www.encyclopedia.com>.

MICHAEL ALLABY. "quillworts." A Dictionary of Plant Sciences. 1998. Encyclopedia.com. (May 29, 2012). http://www.encyclopedia.com/doc/1O7-quillworts.html

MICHAEL ALLABY. "quillworts." A Dictionary of Plant Sciences. 1998. Retrieved May 29, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O7-quillworts.html

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Free newspaper and magazine articles

	PTERIDOPHYTES OF NORTHEAST ALABAMA AND ADJACENT HIGHLANDS. Magazine article from: Journal of the Alabama Academy of Science; 10/1/2000
	Isoetes duriei New to Lebanon.(SHORTER NOTES) Magazine article from: American Fern Journal; 10/1/2009
	Safe harbour for endangered species.(Brief article) Magazine article from: Alternatives Journal; 3/1/2009