| NOUN | plant | false ragweed, burweed marsh elder, Iva xanthifolia | tall annual marsh elder common in moist rich soil in central North America that can cause contact dermatitis |
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| Meaning | tall annual marsh elder common in moist rich soil in central North America that can cause contact dermatitis; produces much pollen that is a major cause of hay fever. | |
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| Synonyms | burweed marsh elder, Iva xanthifolia | |
| Broader | marsh elder, iva | Any of various coarse shrubby plants of the genus Iva with small greenish flowers |
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