ragweed


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ragweed,

any plant of the genus Ambrosia, coarse, weedy herbs belonging to the family Asteraceae (asteraster
[Gr.,=star], common name for the Asteraceae (Compositae), the aster family, in North America, name for plants of the genus Aster, sometimes called wild asters, and for a related plant more correctly called China aster (Callistephus chinensis
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 family), most of which are native to America. They have inconspicuous greenish flowers and soft subdivided leaves. Ragweeds are regarded as especially troublesome because their pollen is acknowledged as the primary cause of hay fever—especially the pollen of A. artemisiifolia (common ragweed) and A. trifida (great ragweed), the two most prevalent species in North America. The leaves of the common ragweed were formerly used as an astringent and hemostatic; they sometimes impart a bitter taste to milk if eaten by cattle. One variety (elatior) of this species has become widely naturalized in Europe. Ragweeds are classified in the division MagnoliophytaMagnoliophyta
, division of the plant kingdom consisting of those organisms commonly called the flowering plants, or angiosperms. The angiosperms have leaves, stems, and roots, and vascular, or conducting, tissue (xylem and phloem).
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, class Magnoliopsida, order Asterales, family Asteraceae.
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ragweed

ragweed

Common allergen. Goldenrod is often blamed because it blooms right next to ragweed, but goldenrod is actually the antidote! Ragweed is all green, sometimes greyish-silver-green. Has distinct finger-like leaves with erect seed-pod spikes. Although many are allergic to ragweed, it is used by others for conditions like nausea, intestinal cramps, menstrual cramps and stroke. (tea from leaves and root) Highly astringent (stops bleeding). Seeds could be used as porridge or cereal.
References in periodicals archive ?
During ragweed pollen season (late summer and early fall), levels are highest in the morning.
The densities of adults and eggs were higher than expected in the common ragweed in the northern sectors of a few plots, each located to the south of another plot (data not shown).
The short ragweed pollen product Ragwitek is indicated for the treatment of short ragweed pollen-induced AR, with or without conjunctivitis, confirmed by positive skin test or in vitro testing for pollen-specific IgE antibodies for short ragweed pollen.
Finally, the authors linked projected pollen levels with information on ragweed sensitization and population density to estimate how many people would be sensitized to ragweed pollen in the future.
Allergy to ragweed pollen has become increasingly common since the plant first gained a foothold in Europe in the mid-1900s but it is particularly prevalent in Eastern Europe.
* The report provides a snapshot of the global therapeutic landscape of Ragweed Allergy
* Coverage of the Ragweed Allergy pipeline on the basis of target, MoA, route of administration and molecule type
In a brief report titled "Ragweed in Japan" (7) Durham (a botanist) cited the above-mentioned report by Hara (5) on the airborne pollens, and stated that ragweed was uncommon in Japan, and therefore that airborne ragweed pollen did not cause any problem.
Nelson emphasized that SLIT's approval also will create a new dilemma for physicians and their many patients with multiple allergies, say, to trees, dogs, and molds in addition to grasses or ragweed.
In other words, over the course of a month, a patient on SLIT will take a roughly 30 times greater dose of grass or ragweed allergen than will a patient on SCIT.
26 ( ANI ): Researchers are set to discuss and make recommendations on the safety and efficacy of oral tablets used to treat ragweed allergy symptoms, during a public meeting of the Allergenic Products Advisory Committee, organized by the Food and Drug Administration (FDA).
A single ragweed plant can produce up to a billion pollen grains, causing misery for millions of people who suffer from poorly managed seasonal allergic rhinitis, better known as hay fever, according to the American Academy of Allergy, Asthma and Immunology.