| 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 |
| Ageratina gentryana B.L. Turner, 1987 |
| Ageratina glabrata (Kunth) R.M. King & H. Rob., 1970 |
| Ageratina glauca (Sch. Bip. ex Klatt) R.M. King & H. Rob., 1970 |
| Ageratina glischra (B.L. Rob.) R.M. King & H. Rob., 1970 |
| Ageratina gonzalezorum B.L. Turner, 1985 |
| Ageratina grandidentata (DC.) R.M. King & H. Rob., 1970 |
| Ageratina grandifolia (Regel) R.M. King & H. Rob., 1986 |