| Parthenium confertum var. microcephalum Rollins, 1950 |
| Parthenium densipilum S.F. Blake, 1924 |
| Parthenium fruticosum Less. ex Schltdl. & Cham., 1830 |
| Parthenium fruticosum var. fruticosum Less. ex Schltdl. & Cham., 1830 |
| Parthenium fruticosum var. trilobatum Rollins, 1950 |
| Parthenium hysterophorus L., 1753 |
| Parthenium hysterophorus var. lyratum A. Gray, 1882 |
| Parthenium incanum Kunth, 1818 |
| Parthenium lloydii Bartlett, 1916 |
| Parthenium lozanoanum Bartlett, 1909 |
| Parthenium parviceps S.F. Blake, 1924 |
| Parthenium rollinsianum Rzed., 1959 |
| Parthenium schottii Greenm. ex Millsp. & Chase, 1904 |
| Parthenium stramonium Greene, 1901 |
| Parthenium tomentosum DC., 1836 |
| Parthenium tomentosum var. stramonium (Greene) Rollins, 1950 |
| Parthenium tomentosum var. tomentosum DC., 1836 |
| Pectidinae Less., 1832 |
| Pectidium Less., 1831 |
| Pectidium punctatum Less., 1831 |