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archegonium

archegonium (pl. archegonia) The multicellular flask-shaped female sex organ of bryophytes, clubmosses, horsetails, ferns, and many gymnosperms. Such plants are described as archegoniate to distinguish them from algae, which do not possess archegonia. The dilated base, the venter, contains the oosphere (female gamete). The cells of the narrow neck liquefy to allow the male gametes to swim towards the oosphere. The archegonium is thus an adaptation to the terrestrial environment as it provides a means for the male gametes to reach the female gamete. Compare antheridium.

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"archegonium." A Dictionary of Biology. . Encyclopedia.com. 25 Sep. 2017 <http://www.encyclopedia.com>.

"archegonium." A Dictionary of Biology. . Encyclopedia.com. (September 25, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/archegonium-0

"archegonium." A Dictionary of Biology. . Retrieved September 25, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/archegonium-0

archegonium

archegonium A female sex organ of liverworts, mosses, ferns, and most gymnosperms. It is usually a flask-shaped organ, comprising a swollen base or venter containing a single egg-cell and a slender elongated neck containing one or more layers of cells.

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"archegonium." A Dictionary of Plant Sciences. . Encyclopedia.com. 25 Sep. 2017 <http://www.encyclopedia.com>.

"archegonium." A Dictionary of Plant Sciences. . Encyclopedia.com. (September 25, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/archegonium

"archegonium." A Dictionary of Plant Sciences. . Retrieved September 25, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/archegonium