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A weedy North American annual plant (Conyza canadensis) in the composite family, having a tall erect stem, narrow leaves, and numerous small whitish flower heads grouped in panicles. Also called mare's tail.
(Plants) the US name for Canadian fleabane. See fleabane3
a North American composite weed, Erigeron canadensis, having narrow hairy leaves and clusters of very small greenish flowers.
An annual common throughout North America. It grows as high as six feet and during the Depression years of the 1930s was sometimes pulled up and fed to livestock.
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|Noun||1.||horseweed - erect perennial strong-scented with serrate pointed leaves and a loose panicle of yellowish flowers; the eastern United States|
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.||horseweed - common North American weed with linear leaves and small discoid heads of yellowish flowers; widely naturalized throughout temperate regions; sometimes placed in genus Erigeron|
weed - any plant that crowds out cultivated plants