Horseweed

n.

1.

(Bot.) A composite plant (Erigeron Canadensis), which is a common weed.

Noun	1.	horseweed - 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
	2.	horseweed - 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

Collinsonia, Collinsonia canadensis, genus Collinsonia, herb, herbaceous plant, horse balm, richweed, stone root, stone-root, stoneroot