View source for Ceratopteridaceae

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| name = ''Ceratopteridaceae''
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| familia = Ceratopteridaceae
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Ceratopteridaceae (Parkeriaceae) (from the genus Ceratopteris, meaning horn-fern). Ceratopteris Family. Aquatic ferns rooting in the mud: leaves of two sorts, the ones less divided with broader segments and veins more or less anastomosing; the more aerial fertile ones much divided, with narrow segments, and revolute margins which later almost completely inclose the scattered sporangia: indusium wanting: sporangia globular, thin-walled with a very diverse broad nearly complete or nearly wanting annulus; rarely the annulus wanting; dehiscence transverse: prothallia unisexual, thalloid; antheridia not superficial.

Only one genus and a few species of tropical distribution are known, the only aquatic species among the true ferns. The habit, the absence of sori, the variable annulus, and the sunken antheridia are distinctive.

This fern is sometimes cooked and eaten as greens.

One or two species are frequently grown for aquaria and aquatic gardens.
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==Gallery==
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==References==
*[[Standard Cyclopedia of Horticulture]], by L. H. Bailey, MacMillan Co., 1963
<!--- xxxxx  *Flora: The Gardener's Bible, by Sean Hogan. Global Book Publishing, 2003. ISBN 0881925381  -->
<!--- xxxxx  *American Horticultural Society: A-Z Encyclopedia of Garden Plants, by Christopher Brickell, Judith D. Zuk. 1996. ISBN 0789419432  -->
<!--- xxxxx  *Sunset National Garden Book. Sunset Books, Inc., 1997. ISBN 0376038608  -->

==External links==
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