1. Common North American weed with linear leaves and small discoid heads of yellowish flowers; widely naturalized throughout temperate regions; sometimes placed in genus Erigeron
   "Erigeron canadensis sprouted in the untended garden";
   - horseweed, Canadian fleabane, fleabane, Conyza canadensis

Type of: weed

Part of: Conyza, genus Conyza

Encyclopedia: Erigeron canadensis