ambrosia artemisiifolia

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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.
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Pennsylvania smartweed), Ambrosia artemisiifolia, and Chenopodium album (lamb's quarter).
11), with Ambrosia artemisiifolia as the dominant species, followed by exotic and native weeds of much lower relative importance.
Patients were randomized to receive a once-daily tablet of Ambrosia artemisiifolia (ragweed) allergen extract at a dose of 6 Amb a 1-U or 12 Amb a 1-U or placebo for approximately 16 weeks prior to and throughout the ragweed pollen season, for a total treatment period of 52 weeks.