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Horsetails, Whisk Ferns, Ferns (Phylum Pterophyta) ... Asexual Reproduction ... Left: Fern gametophyte X 40 showing antheridia. Fern gametophytes are small, heart-shaped structures. The dark-stained cells near the center are antheridia.
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faculty.clintoncc.suny.edu/faculty/Michael.Gregory/file...
faculty.clintoncc.suny.edu/faculty/Michael.Gregory/files/Bio%20102/Bio%20102%20lectures/seedless%20plants/seedless%20plants.htm
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gia) are fused into two's or three's. Reproduction. In whisk ferns, an alternation of gener- ations results in a dominant sporophyte plant producing ...
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www.springerlink.com/index/v61355p375715932.pdf
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Fern - Wikipedia, the free encyclopedia
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A fern is any one of a group of about 20,000 species of plants classified in the phylum or division Pteridophyta , also known as Filicophyta . The group is also referred to as Polypodiophyta ,...
en.wikipedia.org/wiki/Fern
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Plants may be informally grouped into three categories based on structure and mode of reproduction: ... Whisk Ferns have a green branching stem with tiny scale-like appendages and they produce their spores in yellow globular structures. They are unique among the vascular plants in that they ... The fern, a vascular spore plant,
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botany.suite101.com/article.cfm/structure_and_reproduct...
botany.suite101.com/article.cfm/structure_and_reproduction_of_ferns_and_others
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Cite this article ... Two living genera, Psilotum and Tmesipteris, with only two species of the former and less than 30 of the latter, constitute the entire phylum. Both genera are weeds in the tropics and subtropics. ... The sporophyte of Psilotum looks like a survivor from the Devonian age; it has no leaves nor roots,
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www.cliffsnotes.com/WileyCDA/CliffsReviewTopic/Phylum-P...
www.cliffsnotes.com/WileyCDA/CliffsReviewTopic/Phylum-Psilotophyta-Whisk-Ferns.topicArticleId-23791,articleId-23767.html
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In New Zealand, the whisk fern (Psilotum nudum) is confined to warm habitats, especially thermal ground in the North Island. It is very distinctive, with light green stems, tiny scale leaves, and tri-lobed spore capsules.
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www.teara.govt.nz/en/ferns-and-lycophytes/4/4
www.teara.govt.nz/en/ferns-and-lycophytes/4/4
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Whisk fern, Psilotum nudum (Family Psilotaceae), is a widespread, rootless, green-stemmed epiphyte. Technically, the whisk fern plant is said to have no leaves, but instead possesses minute enations along the angular stem axis and in association with the 3-lobed spore-producing structure, the synangium.
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www.washjeff.edu/greenhouse/Pnudum/
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Moisture and proximity, however, are a factor in determining whether or not reproduction can successfully occur.9 ... Whisk Fern. Image (C) Courtesy of Micheal Knee, Ohio State University.
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www.personal.psu.edu/users/r/e/rer185/habitat.htm
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Though they have been considered “primitive,” recent developmental and molecular evidence suggests that the group may actually be reduced from fern-like ancestors. There is not universal agreement on this, but we here treat them with the ferns for that reason. ... the whisk ferns...
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www.ucmp.berkeley.edu/plants/pterophyta/psilotales.html
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