noun erect perennial strong-scented with serrate pointed leaves and a loose panicle of yellowish flowers.
— synonyms: horse_balm, stoneroot, stone-root, richweed, stone_root, Collinsonia_canadensis
noun common North American weed with linear leaves and small discoid heads of yellowish flowers.
— synonyms: Canadian_fleabane, fleabane, Conyza_canadensis, Erigeron_canadensis