Erect perennial strong-scented with serrate pointed leaves and a loose panicle of yellowish flowers; the eastern United States.

synonyms: Collinsonia canadensis, horse balm, richweed, stone-root, stone root, stoneroot.

Common North American weed with linear leaves and small discoid heads of yellowish flowers; widely naturalized throughout temperate regions; sometimes placed in genus Erigeron.

synonyms: Canadian fleabane, Conyza canadensis, Erigeron canadensis, fleabane.

Polish: konyza kanadyjska, przymiotno kanadyjskie