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burweed marsh elder

noun
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Definition of burweed marsh elder

: a tall annual marsh elder (Iva xanthifolia) that is common in moist rich soil in central North America, causes contact dermatitis in many people, and produces much pollen that is a major cause of hay fever where the plant occurs

— called also false ragweed

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“Burweed marsh elder.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/burweed%20marsh%20elder. Accessed 27 Feb. 2021.

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