cycad


Also found in: Dictionary, Thesaurus, Medical, Wikipedia.

cycad

(sī`kăd), any plant of the order Cycadales, tropical and subtropical palmlike evergreens. The cycads, ginkgoesginkgo
or maidenhair tree,
tall, slender, picturesque deciduous tree (Ginkgo biloba) with fan-shaped leaves. The ginkgo is native to E China, where it was revered by Buddhist monks and planted near temples.
..... Click the link for more information.
, and conifersconifer
[Lat.,=cone-bearing], tree or shrub of the order Coniferales, e.g., the pine, monkey-puzzle tree, cypress, and sequoia. Most conifers bear cones and most are evergreens, though a few, such as the larch, are deciduous.
..... Click the link for more information.
 comprise the three major orders of gymnosperms, or cone-bearing plants (see conecone
or strobilus
, in botany, reproductive organ of the gymnosperms (the conifers, cycads, and ginkgoes). Like the flower in the angiosperms (flowering plants), the cone is actually a highly modified branch; unlike the flower, it does not have sepals or petals.
..... Click the link for more information.
 and plantplant,
any organism of the plant kingdom, as opposed to one of the animal kingdom or of the kingdoms Fungi, Protista, or Monera in the five-kingdom system of classification.
..... Click the link for more information.
). The cycads first appeared in the Permian period. They are the most primitive of the living seed-bearing plants and in many ways resemble the fernsfern,
any plant of the division Polypodiophyta. Fern species, numbering several thousand, are found throughout the world but are especially abundant in tropical rain forests. The ferns and their relatives (e.g.
..... Click the link for more information.
. Some have tuberous underground stems, with the crown of leathery, glossy, fernlike leaves springing from ground level; others have a columnar stem, usually 6 to 10 ft (1.8–3.1 m) high (though the corcho of Cuba reaches 30 ft/9.1 m), and are often mistaken for palms. There are 11 genera composed of less than 150 species, some found in very restricted areas. Many cycads (e.g., the fern palm of the Old World tropics and the nut palm of Australia) bear poisonous nutlike seeds. The pith of the coontie (Zamia floridana) yields a starch called Florida arrowrootarrowroot,
any plant of the genus Maranta, usually large perennial herbs, of the family Marantaceae, found chiefly in warm, swampy forest habitats of the Americas and sometimes cultivated for their ornamental leaves.
..... Click the link for more information.
 or sagosago
[Malay], edible starch extracted from the pithlike center of several E Asian palms (chiefly Metroxylon sagu) or sometimes of cycads. The starch is an important item in the diet in some parts of E Asia and is exported for use in foods (e.g.
..... Click the link for more information.
; the coontie is often called sago palm. Cycads are grown as ornamentals in warm regions and in greenhouses. The cycads are classified in the division PinophytaPinophyta
, division of the plant kingdom consisting of those organisms commonly called gymnosperms. The gymnosperms, a group that includes the pine, have stems, roots and leaves, and vascular, or conducting, tissue (xylem and phloem).
..... Click the link for more information.
, class Cycadopsida.
References in periodicals archive ?
Cycads are seed plants identifiable by their stout and woody trunks and crown of large, hard and stiff, evergreen leaves.
There are also other terms that are used in the descriptions of cycad, seeds and embryos that need clarification such as endotesta, perisperm, epicotyl and hypocotyl.
The origin of the Cycad Aulacaspis scale (CAS) is from Southeast Asia where it was described in Thailand by Takagi (1977) from specimens collected in Bangkok on Cycas sp.
About Cycad Group Cycad Group is a venture capital firm focused on investments in companies with enabling solutions, disruptive technologies and innovative products.
Stefanutti Stocks signed a pact with Bortan Trust, Alfred Smith, and Burcron Props 15 to purchase Cycad Pipelines and its related properties housed by property holding companies for R298-million and R8-million respectively.
The susceptibility of the predatory beetles Cybocephalus nipponicus Endrody-Younga and Rhyzobius lophanthae Blaisdell to 6 pesticides commonly used for treating cycad aulacaspis scale, Aulacaspis yasumatsui Takagi, was tested.
Cycad seeds have been used for food and medicines on three Pacific islands--Guam, Papua, and the Kii peninsula of Honshu Island, Japan--where disproportionately high numbers of people have suffered from lytigo-bodig, a rare condition that shares symptoms with amyotrophic lateral sclerosis (Lou Gehrig disease) and Parkinson and Alzheimer diseases.
Let me show you the big lump out back,'' said Janica Jones, the zoo's horticulturist, gesturing toward a 3-foot cycad amputated of its limbs outside the zoo's unofficial rescue center greenhouse of 750 plants.
New investors Auriga Partners, Cycad Group, and Alexandria Real Estate Equities also participated in the financing and were joined by returning founding investors Lux Capital Management, Polaris Venture Partners and Morningside Ventures.
Based on their belief in the SOFIE team, the founders, and the technology, Tata Industries through its wholly owned subsidiary, led the Series A round, with other existing investors including MRM Capital and the Cycad Group.
Earlier work by Cox and his colleagues found that BMAA is produced by cyanobacteria living symbiotically in the roots of cycad plants, and that the toxin, somehow, grows more concentrated as it moves up the food chain--from symbiotic microbes to cycad hosts to cycad-seed-eating bats to bat-eating people (SN: 12/06/03, p.