| erigeron | (n) cosmopolitan genus of usually perennial herbs with flowers that resemble asters; leaves occasionally (especially formerly) used medicinally, Syn. genus Erigeron |
| 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 |
| 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 |
| 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 |
| robin's plantain | (n) common perennial of eastern North America having flowers with usually violet-purple rays, Syn. Erigeron pulchellus |
| seaside daisy | (n) slightly succulent perennial with basal leaves and hairy sticky stems each bearing a solitary flower head with narrow pink or lavender rays; coastal bluffs Oregon to southern California, Syn. Erigeron glaucous, beach aster |
| showy daisy | (n) plant having branching leafy stems each branch with an especially showy solitary flower head with many narrow pink or lavender or white rays; northwestern United States mountains, Syn. Erigeron speciosus |
| 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 |