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 ?
Ragweed plants release very fine pollen and a whole lot of it.
Last year, researchers from the University of Leicester recorded airborne ragweed pollen levels in the East Midlands high enough to cause significant hay-fever attacks.
Nobody's talking about this yet but, based on the way the climate has been behaving, we're likely to experience a second pollen vortex when the grass pollen and the ragweed pollen begin to overlap, starting late July and August," says Joan Lehach, an integrative medicine physician specializing in allergy, asthma, and clinical immunology at Montefiore Medical Center, New York.
Ragwitek contains an extract from short ragweed (Ambrosia artemisiifolia) pollen.
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.
If you notice eating watermelon, cantaloupe or avocado make you cough and itch, it may be a symptom of ragweed allergy.
Ragweed pollen is the primary culprit of fall allergies.
SAN ANTONIO -- GREER[R], a leading developer and provider of allergy immunotherapy products and services, announces the release of new data from its pivotal Phase III investigational clinical trial evaluating the efficacy and safety of GREER Sublingual (standardized short ragweed extract) Allergy Immunotherapy Liquid (SAIL)[TM], as a treatment for adults with allergic rhinoconjunctivitis caused by short ragweed pollen.
Overall, the data shows that the ragweed pollen season has increased by between 13 and 27 days at latitudes above 44 degrees North 6 an area that includes the northernmost parts of the U.
Naturally successive governments have taken ineffective action by various statutes to control the spread of ragweed.
Recent warming by latitude associated with increased length of ragweed pollen season in central North America.
Each of these subjects underwent a test with an extract of grass or ragweed placed in the nose.