Pteridaceae, family Pteridaceae(noun)
one of a number of families into which the family Polypodiaceae has been subdivided in some classification systems; Pteridaceae is itself in turn sometimes further subdivided
Pteridaceae is a large family of ferns in the order Polypodiales. Members of the family have creeping or erect rhizomes and are mostly terrestrial or epipetric. The leaves are almost always compound and have linear sori that are typically on the margins of the leaves and lack a true indusium, typically being protected by a false indusium formed from the reflexed margin of the leaf. The family includes four groups of genera that are sometimes recognized as separate families: the adiantoid, cheilanthoid, pteroid, and hemionitidoid ferns. Relationships among these groups remain unclear, and although some recent genetic analyses of the Pteridales suggest that neither the family Pteridaceae nor the major groups within it are all monophyletic, as yet these analyses are insufficiently comprehensive and robust to provide good support for a revision of the order at the family level.
U.S. National Library of Medicine
A plant family of the order Polypodiales, class Filicopsida, division Pteridophyta (FERNS).
The numerical value of Pteridaceae in Chaldean Numerology is: 3
The numerical value of Pteridaceae in Pythagorean Numerology is: 6
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"Pteridaceae." Definitions.net. STANDS4 LLC, 2018. Web. 20 Oct. 2018. <https://www.definitions.net/definition/Pteridaceae>.