Pteridophyta

(redirected from pteridophyte)
Also found in: Dictionary, Thesaurus, Medical, Wikipedia.
Related to pteridophyte: angiosperm, Bryophyta, Gymnosperms

Pteridophyta

[‚ter·ə′däf·əd·ə]
(botany)
The equivalent name for Polypodiophyta.
Enlarge picture
ferns

ferns

This is a debatable plant. Must eat cooked or steamed, not raw, although some people do eat fiddleheads raw and end up getting throat and gastric cancers. Fiddleheads are the young furled (coiled up) heads of a young fern. Asians dip them into boiling water, then dry them and then grind them into powder, and whenever they cook food, they add that powder to their food. Apparently it helps emulsify and break down bad fats in the body. You can chop up the stem and steam it, tastes similar to green beans, can be eaten with a little bit of butter and salt. To cook fiddleheads, remove the yellow/brown skin, then boil the sprouts twice with a change of water between boilings to remove toxins. The roots of the common Male Fern (Dryopteris filix-mas), was used to kill tapeworms, but many consider it too toxic. When using ferns, consult with local expert to double check. Some are carcinogenic.

Pteridophyta

 

a large group of higher plants to which are sometimes assigned all higher seedless plants except mosses (Bryophyta). Unlike the bryophytes, the sporophyte—the asexual generation—is well developed and divided, except in Psilotophyta, into stems, leaves, and roots. Spores develop, from which emerges the gametophyte—the sexual generation. The gametophyte is poorly developed, almost undifferentiated, and bears sexual organs (in males, antheridia, and in females, archegonia). After fertilization, another asexual generation develops.

The Pteridophyta include ferns, horsetails, clubmosses, selaginellas, isoetes, psilotaceous plants, and many extinct groups of plants. They were formerly regarded as a single taxonomic group —a division (or subdivision)—and were divided into a number of classes. On the basis of an extensive study of the vegetative and reproductive organs of extinct and extant plants, the group Pteridophyta has been divided into several natural divisions, each of which has its own history. These include the Psilotophyta, Lycopodiophyta, Equisetineae, and Polypodiophyta.

References in periodicals archive ?
1992) Distribution and diversity of montane pteridophytes of the Chirrip National Park, Costa Rica.
Ex situ conservation methods for bryophytes and pteridophytes.
In addition to quiliworts, convergence of spore ornamentation patterns is found in many pteridophytes (Tryon & Lugardon, 1991).
Although there is a great deal of variation within the order, filicaleans typically have relatively small and thin-walled sporangia that usually develop from one or two initials (Eames, 1936; Bierhorst, 1971) and that produce smaller numbers of spores than do eusporangiate pteridophytes (Bower, 1923-1928; Eames, 1936).
The embryos of pteridophytes have a single terminal first-leaf, a usually lateral growing point, and a root that fails to develop, followed by the formation of adventitious roots.
Pteridophytes that indicate environmental alteration in the temperate forest of San Jeronimo Amanalco, Texcoco, Mexico
It is common in stems, rhizomes, and leaves among pteridophytes, uncommon to absent among gymnosperms, and widespread but of spotty occurrence among angiosperms (Guttenberg, 1943).
Assessment fact sheets for all bryophyte and pteridophyte species, saproxylic beetles, remaining terrestrial molluscs, and selected vascular plants occurring in Europe: these assessments will be presented in the format of fact sheets on the IUCN Red List website, in an access database, and they will also be accessible from the Europa website;
Influence of edaphic specialization on pteridophyte distribution in Neotropical Rain Forest.
2001 A comparison of the tropical montane pteridophyte flora of Mount Kinabalu, Borneo, and Parque Nacional Carrasco, Bolivia.