- marsh elder, 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
--1 is a kind of marsh plant, bog plant, swamp plant
--1 is a member of genus Iva
--1 has particulars: burweed marsh elder, false ragweed, Iva xanthifolia