erect perennial strong-scented with serrate pointed leaves and a loose panicle of yellowish flowers; the eastern United States
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common North American weed with linear leaves and small discoid heads of yellowish flowers; widely naturalized throughout temperate regions; sometimes placed in genus Erigeron
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Horseweed \Horse"weed`\, n. (Bot.) A composite plant ({Erigeron Canadensis}), which is a common weed.