Iva xanthifolia

Definitions of Iva xanthifolia
  1. noun
    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
    synonyms: burweed marsh elder, false ragweed
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    type of:
    iva, marsh elder
    any of various coarse shrubby plants of the genus Iva with small greenish flowers; common in moist areas (as coastal salt marshes) of eastern and central North America
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