Skip to definition.
Get the FREE one-click dictionary software for Windows or the iPhone/iPad and Android apps

Noun: horseweed  'hors,weed
  1. Erect perennial strong-scented with serrate pointed leaves and a loose panicle of yellowish flowers; the eastern United States
    - horse balm, 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
    - Canadian fleabane, fleabane, Conyza canadensis, Erigeron canadensis

Derived forms: horseweeds

Type of: herb, herbaceous plant, weed

Part of: Collinsonia, Conyza, genus Collinsonia, genus Conyza

Encyclopedia: Horseweed