| Ageratum glanduliferum Sch. Bip. ex Benth. & Hook. f., 1873 |
| Ageratum glanduliferum Sch. Bip. ex Hemsl., 1881 |
| Ageratum grossedentatum Rzed., 2018 |
| Ageratum guatemalense M.F. Johnson, 1971 |
| Ageratum guianense Aubl., 1775 |
| Ageratum houstonianum Mill., 1768 |
| Ageratum isocarphoides (DC.) L.O. Williams, 1975 |
| Ageratum laciniatum Sessé & Moc., 1889 |
| Ageratum latifolium Cav., 1797 |
| Ageratum lineare Cav., 1794 |
| Ageratum littorale A. Gray, 1880 |
| Ageratum littorale f. littorale A. Gray, 1880 |
| Ageratum lucidum B.L. Rob., 1901 |
| Ageratum lundellii R.M. King & H. Rob., 1978 |
| Ageratum maritimum Kunth, 1818 |
| Ageratum maritimum var. intermedium (Hemsl.) B.L. Rob., 1913 |
| Ageratum mexicanum Sims, 1824 |
| Ageratum microcarpum (Benth.) Hemsl., 1881 |
| Ageratum microcephalum Hemsl., 1881 |
| Ageratum microphyllum Sch. Bip., 1856 |