Horseweed - Definition
horseweed
n 1: erect perennial strong-scented with serrate pointed leaves
and a loose panicle of yellowish flowers; the eastern
United States [syn: horse balm, horseweed, stoneroot,
stone-root, richweed, stone root, Collinsonia
canadensis]
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 [syn: horseweed, Canadian fleabane, fleabane,
Conyza canadensis, Erigeron canadensis]