One of various plants, supposed to have efficacy in driving away fleas. They belong, for the most part, to the genera Conyza, Erigeron, and Pulicaria.

hairy perennial Eurasian herb with yellow daisylike flowers reputed to destroy or drive away fleas

any of several North American plants of the genus Erigeron having daisylike flowers; formerly believed to repel fleas

common North American weed with linear leaves and small discoid heads of yellowish flowers; widely naturalized throughout temperate regions; sometimes placed in genus Erigeron

Erigeron philadelphicus

Any of several related plants of the genus Erigeron that emit an odor thought to drive away fleas and other insects. Represented in the North Country by Common Fleabane ( Erigeron strigosus).