FLEABANE

noun

1. hairy perennial Eurasian herb with yellow daisylike flowers reputed to destroy or drive away fleas
2. any of several North American plants of the genus Erigeron having daisylike flowers; formerly believed to repel fleas
3. common North American weed with linear leaves and small discoid heads of yellowish flowers; widely naturalized throughout temperate regions; sometimes placed in genus Erigeron