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| common North American weed with linear leaves and small discoid heads of yellowish flowers; widely naturalized throughout temperate regions; common North American weed with linear leaves and small discoid heads of yellowish flowers; widely naturalized throughout temperate regions; sometimes placed in genus Erigeron ❲Conyza canadensis, Erigeron canadensis❳ | |||
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| any of several North American plants of the genus Erigeron having daisylike flowers; formerly believed to repel fleas |