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Intercellular communication in the fern endosymbiotic cyanobacterium <i>Nostoc azollae</i>. [PDF]

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Fern Leaves, Ferns and Fern Allies

American Fern Journal, 1910
The topic would scarcely seem to be one in need of much discussion, but as morphologists and palaeobotanists have lately added a good deal to our knowledge of the subject, completely changing some of the old conceptions, a brief resume will not be out of place.
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FERNS and FERN ALLIES

The Sarawak Museum Journal, 2004
A total of 120 species in 55 genera and 26 families of pteridophytes are reported within the Bau Limestone Area. These represent approximately 20% of the pteridophyte flora of Sarawak. Polypodiaceae has the most species: 21 species.
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Ferns and Fern Allies

1970
The ferns and fern allies include the ferns, psilopsids, lycopsids, and horsetails (sphenopsids). These are seedless, vascular plants. They have an alternation of generations in which the sporophyte is dominant and has an axis containing xylem and phloem.
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