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|Noun||1.||iva - 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|
genus Iva - small genus of American herbs or shrubs; in some classifications placed in a separate family Ambrosiaceae
burweed marsh elder, false ragweed, Iva xanthifolia - 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