WordNet sense 1 (erect perennial strong-scented with serrate pointed leaves and a loose panicle of yellowish flowers; the eastern United States):

richweed, stoneroot, stone-root, horse balm, Collinsonia canadensis, stone root

WordNet sense 2 (common North American weed with linear leaves and small discoid heads of yellowish flowers; widely naturalized throughout temperate regions; sometimes placed in genus Erigeron):

fleabane, Conyza canadensis, Canadian fleabane, Erigeron canadensis