horseweed

Noun

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

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

Related words

• Synonyms: 
  Canadian fleabane , fleabane , Conyza canadensis , Erigeron canadensis , horse balm , stoneroot , stone-root , richweed , stone root , Collinsonia canadensis