horseweed Meaning, Definition & Usage

  1. noun erect perennial strong-scented with serrate pointed leaves and a loose panicle of yellowish flowers; the eastern United States
    stone root; horse balm; richweed; stone-root; stoneroot; Collinsonia canadensis.
  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
    fleabane; Erigeron canadensis; Conyza canadensis; Canadian fleabane.

WordNet

Horse"weed` noun
Definitions
  1. (Bot.) A composite plant (Erigeron Canadensis), which is a common weed.

Webster 1913