fern

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fern

Chinese medicine
Any of a number of ferns (Aspidium falcatum, Dryopteris crassirhizoma, Nephrodium filix, Onoclea orientalis, Woodwardia radicans), the rhizomes of which are used in traditional Chinese medicine; all are referred to guan jung (guan zhong), and thus not differentiated by genus or species. Ferns are anti-inflammatory, anthelmintic and haemostatic, and are used for abscesses, menorrhagia, leukorrhoea, intestinal parasites and thyroiditis.

fern

any pteridophyte plant of the class filicinae, subdivision Pteropsida of the division Tracheophyta, at one time classified in the division Pteridophyta. The ferns constitute the great majority of species in the division and possess large, conspicuous aerial DIPLOID (2) stems. Sporangia are borne on the underside of leaves and the HAPLOID (2) spores usually give rise to homosporous prothalli which carry both ANTHERIDIA and ARCHEGONIA. There is a small group of heterosporous aquatic ferns (see HETEROSPORY).

fern

a terrestrial vascular plant of the order Filicales; reproduction is through spores. A few ferns are poisonous. See pteridium aquilinum, equisetum, cheilanthes, dryopteris. Called also pteridophyte.
References in periodicals archive ?
Electrophoresis is modifying our concepts of evolution in homosporous pteridophytes.
Range size and its ecological correlates among the pteridophytes in the Carrasco National Park, Bolivia.
Conclusion: In Togo the horticultural flora was rich with 612 species including 20 Pteridophytes 17 Gymnosperms and 575 Angiosperms.
These are symbiotic associations observed in 200 botanical families representing 1,000 genera and about 300,000 plant species [6] including angiosperms, gymnosperms, pteridophytes, and some bryophytes with a limited range of fungi belonging to a single order, that of Glomeromycota [37].
The taxonomic treatments cover pteridophytes and gymnosperms, dicotyledons, and monocotyledons.
One (1) species was classified as gymnosperm, four (4) were classified as pteridophytes, and 103 were classified as angiosperms.
Flora of New Zealand: naturalised pteridophytes, gymnosperms, dicotyledons 4, 1365 pp.
The flora of the Archipelago of San Andres and Providencia has been relatively well studied, and at least two major expeditions have included these islands, the "Fifth George Vanderbilt Expedition" in 1941, and the "Catherwood Chaplin West Indies Expedition" from the Academy of Sciences of Philadelphia in 1948, of which only the Pteridophytes were published (Proetor, 1950).
Cryptogamic Botany, Volume II, Bryophytes and Pteridophytes.
Chapters also look in detail at families of pteridophytes, gymnosperms, and angiosperms.