| Ageratina miahuatlana B.L. Turner, 1995 |
| Ageratina microcephala B.L. Turner, 2012 |
| Ageratina miquihuana (B.L. Turner) R.M. King & H. Rob., 1977 |
| Ageratina modesta (Kunth) R.M. King & H. Rob., 1972 |
| Ageratina moorei B.L. Turner, 1990 |
| Ageratina motozintlensis R.M. King & H. Rob., 1990 |
| Ageratina muelleri (Sch. Bip. ex Klatt) R.M. King & H. Rob., 1970 |
| Ageratina multiserrata (Sch. Bip.) R.M. King & H. Rob., 1972 |
| Ageratina mygindifolia (A. Gray) R.M. King & H. Rob., 1970 |
| Ageratina nelsonii R.M. King & H. Rob., 1972 |
| Ageratina neohintoniorum B.L. Turner, 1987 |
| Ageratina nesomii B.L. Turner, 1983 |
| Ageratina oaxacana (Klatt) R.M. King & H. Rob., 1975 |
| Ageratina oligocephala (DC.) R.M. King & H. Rob., 1970 |
| Ageratina oppositifolia (A. Gray) B.L. Turner, 1987 |
| Ageratina oreithales (Greenm.) B.L. Turner, 1987 |
| Ageratina ovilla (Standl. & Steyerm.) R.M. King & H. Rob., 1970 |
| Ageratina ozolotepecana B.L. Turner, 2010 |
| Ageratina pachypoda (B.L. Rob.) R.M. King & H. Rob., 1970 |
| Ageratina pacifica (B.L. Rob.) R.M. King & H. Rob., 1970 |