| Ageratina cronquistii R.M. King & H. Rob., 1978 |
| Ageratina cruzii B.L. Turner, 1992 |
| Ageratina cuicatlana B.L. Turner, 2013 |
| Ageratina cupressorum (Standl. & Steyerm.) R.M. King & H. Rob., 1972 |
| Ageratina cylindrica (McVaugh) R.M. King & H. Rob., 1972 |
| Ageratina deltoidea (Jacq.) R.M. King & H. Rob., 1970 |
| Ageratina desquamans (B.L. Rob.) R.M. King & H. Rob., 1970 |
| Ageratina dolichobasis (McVaugh) R.M. King & H. Rob., 1972 |
| Ageratina durangensis (B.L. Rob.) R.M. King & H. Rob., 1970 |
| Ageratina eleazarii Rzed., 2018 |
| Ageratina enixa (B.L. Rob.) R.M. King & H. Rob., 1970 |
| Ageratina ernstii R.M. King & H. Rob., 1978 |
| Ageratina espinosarum (A. Gray) R.M. King & H. Rob., 1970 |
| Ageratina espinosarum var. espinosarum (A. Gray) R.M. King & H. Rob., 1970 |
| Ageratina espinosarum var. subintegrifolia (B.L. Rob.) B.L. Turner, 1987 |
| Ageratina etlana B.L. Turner, 2013 |
| Ageratina etlensis (B.L. Rob.) R.M. King & H. Rob., 1970 |
| Ageratina flourensifolia (B.L. Turner) R.M. King & H. Rob., 1981 |
| Ageratina fosbergii R.M. King & H. Rob., 1974 |
| Ageratina geminata (McVaugh) R.M. King & H. Rob., 1972 |