| Ageratum albidum var. albidum (DC.) Hemsl., 1881 |
| Ageratum albidum var. nelsonii B.L. Rob., 1913 |
| Ageratum arbutifolium Kunth, 1818 |
| Ageratum arsenei B.L. Rob., 1922 |
| Ageratum callosum S. Watson, 1889 |
| Ageratum conyzoides L., 1753 |
| Ageratum cordatum (S.F. Blake) L.O. Williams, 1975 |
| Ageratum corymbosum Zucc., 1806 |
| Ageratum corymbosum f. salicifolium (Hemsl.) M.F. Johnson, 1971 |
| Ageratum echioides (Less.) Hemsl., 1881 |
| Ageratum elachycarpum B.L. Rob., 1913 |
| Ageratum elassocarpum S.F. Blake, 1924 |
| Ageratum gaumeri B.L. Rob., 1911 |
| 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 |