horse·weed /ˈhɔrsˌwid/
Horse·weed n. Bot. A composite plant (Erigeron Canadensis), which is a common weed.
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horseweed
n 1: erect perennial strong-scented with serrate pointed leaves
and a loose panicle of yellowish flowers; the eastern
United States [syn: 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 [syn: Canadian fleabane, fleabane, Conyza
canadensis, Erigeron canadensis]