| Asteraceae | |
Erigeron philadelphicus fo. angustatus
| Vict. & J. Rousseau | Contr. Inst. Bot. Univ. Montreal 36: 61 | 1940 |
| Asteraceae | |
Erigeron philadelphicus var. glaber
| J.K. Henry | Ottawa Naturalist 31: 57 | 1917 |
| Asteraceae | |
Erigeron philadelphicus fo. philadelphicus
| | | |
| Asteraceae | |
Erigeron philadelphicus subsp. philadelphicus
| | | |
| Asteraceae | |
Erigeron philadelphicus var. philadelphicus
| | | |
| Asteraceae | |
Erigeron philadelphicus subsp. provancheri
| (Vict. & J. Rousseau) J.K. Morton | Canad. J. Bot. 66(2): 301 | 1988 |
| Asteraceae | |
Erigeron philadelphicus var. provancheri
| (Vict. & J. Rousseau) B. Boivin | Naturaliste Canad. 89(2): 72 | 1962 |
| Asteraceae | |
Erigeron philadelphicus fo. purpureus
| (Aiton) Farw. | Amer. Midl. Naturalist 11(2): 70 | 1928 |
| Asteraceae | |
Erigeron philadelphicus var. quercinus
| DC. | Prodr. 5: 285 | 1836 |
| Asteraceae | |
Erigeron philadelphicus fo. scaturicola
| (Fernald) Cronquist | Brittonia 6(2): 251 | 1947 |
| Asteraceae | |
Erigeron philadelphicus var. scaturicola
| (Fernald) Fernald | Rhodora 49(583): 189 | 1947 |