fleabane, feabane mullet, Pulicaria dysenterica -- (hairy perennial Eurasian herb with yellow daisylike flowers reputed to destroy or drive away fleas)
fleabane -- (any of several North American plants of the genus Erigeron having daisylike flowers; formerly believed to repel fleas)
horseweed, Canadian fleabane, fleabane, Conyza canadensis, Erigeron canadensis -- (common North American weed with linear leaves and small discoid heads of yellowish flowers; widely naturalized throughout temperate regions; sometimes placed in genus Erigeron)