| Asteraceae |
|
Echinacea purpurea
| (L.) Moench | Methodus 591 | 1794 |
| Asteraceae |
|
Echinacea purpurea var. arkansana
| Steyerm. | Rhodora 40(470): 71 | 1938 |
| Asteraceae |
|
Echinacea purpurea var. laevigata
| (C.L. Boynton & Beadle) Cronquist | Rhodora 47(564): 397 | 1945 |
| Asteraceae |
|
Echinacea purpurea fo. liggettii
| Steyerm. | Rhodora 44(520): 150 | 1942 |
| Asteraceae |
|
Echinacea purpurea var. purpurea
| | | |
| Asteraceae |
|
Echinacea purpurea var. serotina
| (Nutt.) L.H. Bailey | Stand. Cycl. Hort. 2: 1088 | 1914 |