| Machaeranthera pinnatifida var. pinnatifida (Hook.) Shinners, 1964 |
| Machaeranthera pinnatifida var. scabrella (Greene) B.L. Turner & D.B. Horne, 1976 |
| Machaeranthera restiformis B.L. Turner, 1973 |
| Machaeranthera riparia (Kunth) A.G. Jones, 1983 |
| Machaeranthera scabrella (Greene) Shinners, 1950 |
| Machaeranthera sonorae (A. Gray) Stucky, 1978 |
| Machaeranthera spinulosa Greene, 1899 |
| Machaeranthera stenoloba (Greene) Shinners, 1950 |
| Machaeranthera tagetina Greene, 1899 |
| Machaeranthera tanacetifolia (Kunth) Nees, 1832 |
| Machaeranthera tenuis (S. Watson) B.L. Turner & D.B. Horne, 1964 |
| Machaeranthera tephrodes Greene, 1899 |
| Machaeranthera turneri M.L. Arnold & R.C. Jacks., 1978 |
| Machaeranthera wigginsii (S.F. Blake) R.L. Hartm., 1990 |
| Machaerantherinae G.L. Nesom, 1994 |
| Macrocarphus Nutt., 1841 |
| Macrorhynchus Less., 1832 |
| Macrorhynchus heterophyllus Nutt., 1841 |
| Macvaughiella R.M. King & H. Rob., 1968 |
| Macvaughiella chiapensis R.M. King & H. Rob., 1991 |