| Achaetogeron mexicanus (A. Gray) De Jong, 1965 |
| Achaetogeron palmeri A. Gray, 1886 |
| Achaetogeron polycephalus Larsen, 1948 |
| Achaetogeron purpurascens Greenm., 1903 |
| Achaetogeron sophiaefolius Larsen, 1948 |
| Achaetogeron subacaulis McVaugh, 1972 |
| Achaetogeron versicolor Greenm., 1905 |
| Achaetogeron wislizeni A. Gray, 1849 |
| Achariterium M.J. Bluff & C.A. Fingerhuth, 1825 |
| Achillea L., 1753 |
| Achillea arenicola A. Heller, 1904 |
| Achillea borealis Bong., 1832 |
| Achillea borealis subsp. arenicola (Pollard) D.D. Keck, 1940 |
| Achillea borealis subsp. borealis Bong., 1832 |
| Achillea borealis subsp. californica (Pollard) D.D. Keck, 1940 |
| Achillea californica Pollard, 1899 |
| Achillea gigantea Pollard, 1899 |
| Achillea lanulosa Nutt., 1834 |
| Achillea lanulosa subsp. alpicola (Rydb.) D.D. Keck, 1940 |
| Achillea lanulosa var. alpicola Rydb., 1900 |