horseweed

Definitions of horseweed

1. noun

   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

   type of:

   herb, herbaceous plant

   a plant lacking a permanent woody stem; many are flowering garden plants or potherbs; some having medicinal properties; some are pests
2. 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
   synonyms: Canadian fleabane, Conyza canadensis, Erigeron canadensis, fleabane

   type of:

   weed

   any plant that crowds out cultivated plants