burweed marsh elder(n = noun.plant) 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;
is a kind of iva, marsh elder

agrippina the elder, american elder, american red elder, black elder, blue elder, box elder, breughel the elder, california box elder, common elder, cosimo the elder, cyrus the elder, dionysius the elder, dwarf elder, edward the elder, elder, elder hand, elder statesman, european elder, european red elder, holbein the elder, long-billed marsh wren, marsh, marsh andromeda, marsh bellflower, marsh buggy, marsh clematis, marsh cress, marsh elder, marsh felwort, marsh fern, marsh gas, marsh gentian, marsh hare, marsh harrier, marsh hawk, marsh hen, marsh horsetail, marsh mallow, marsh marigold, marsh milkweed, marsh orchid, marsh pea, marsh pink, marsh plant, marsh rosemary, marsh st-john's wort, marsh tea, marsh trefoil, marsh wren, ngaio marsh, perennial salt marsh aster, pieter brueghel the elder, pitt the elder, pliny the elder, red-berried elder, reginald marsh, salt marsh, salt marsh mallow, scipio the elder, short-billed marsh wren, stinking elder, strauss the elder, sweet elder, water elder