Skip to main content
Select Source:

Isoetaceae

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.

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"Isoetaceae." A Dictionary of Plant Sciences. . Encyclopedia.com. 16 Aug. 2017 <http://www.encyclopedia.com>.

"Isoetaceae." A Dictionary of Plant Sciences. . Encyclopedia.com. (August 16, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/isoetaceae

"Isoetaceae." A Dictionary of Plant Sciences. . Retrieved August 16, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/isoetaceae

quillwort

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

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"quillwort." The Columbia Encyclopedia, 6th ed.. . Encyclopedia.com. 16 Aug. 2017 <http://www.encyclopedia.com>.

"quillwort." The Columbia Encyclopedia, 6th ed.. . Encyclopedia.com. (August 16, 2017). http://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/quillwort

"quillwort." The Columbia Encyclopedia, 6th ed.. . Retrieved August 16, 2017 from Encyclopedia.com: http://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/quillwort

Isoetes

Isoetes (quillworts) See ISOETACEAE.

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"Isoetes." A Dictionary of Plant Sciences. . Encyclopedia.com. 16 Aug. 2017 <http://www.encyclopedia.com>.

"Isoetes." A Dictionary of Plant Sciences. . Encyclopedia.com. (August 16, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/isoetes

"Isoetes." A Dictionary of Plant Sciences. . Retrieved August 16, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/isoetes

quillworts

quillworts See ISOETACEAE.

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"quillworts." A Dictionary of Plant Sciences. . Encyclopedia.com. 16 Aug. 2017 <http://www.encyclopedia.com>.

"quillworts." A Dictionary of Plant Sciences. . Encyclopedia.com. (August 16, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/quillworts

"quillworts." A Dictionary of Plant Sciences. . Retrieved August 16, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/quillworts