| blue fleabane | (n) widespread weed with pale purple-blue flowers, Syn. Erigeron acer |
| daisy fleabane | (n) widely naturalized white-flowered North American herb, Syn. Erigeron annuus |
| fleabane | (n) hairy perennial Eurasian herb with yellow daisylike flowers reputed to destroy or drive away fleas, Syn. Pulicaria dysenterica, feabane mullet |
| fleabane | (n) any of several North American plants of the genus Erigeron having daisylike flowers; formerly believed to repel fleas |
| philadelphia fleabane | (n) especially pretty plant having a delicate fringe of threadlike rays around flower heads having very slender white or pink rays; United States and Canada, Syn. Erigeron philadelphicus |
| spreading fleabane | (n) well-branched plant with hairy leaves and stems each with a solitary flower head with narrow white or pink or lavender rays; western North America, Syn. Erigeron divergens |
| horseweed | (n) common North American weed with linear leaves and small discoid heads of yellowish flowers; widely naturalized throughout temperate regions; sometimes placed in genus Erigeron, Syn. Conyza canadensis, Erigeron canadensis, fleabane, Canadian fleabane |
| orange daisy | (n) mat-forming herb of Turkestan with nearly double orange-yellow flowers, Syn. orange fleabane, Erigeron aurantiacus |