horseweed
名词 horseweed:
erect perennial strong-scented with serrate pointed leaves and a loose panicle of yellowish flowers; the eastern United States
同义词:horse balm, stoneroot, stone-root, richweed, stone root, Collinsonia canadensis
common North American weed with linear leaves and small discoid heads of yellowish flowers; widely naturalized throughout temperate regions; sometimes placed in genus Erigeron
同义词:Canadian fleabane, fleabane, Conyza canadensis, Erigeron canadensis