| Melampodium tenellum Hook. & Arn., 1838 |
| Melampodium tepicense B.L. Rob., 1909 |
| Melampodium ternatum (La Llave) DC. ex Stuessy, 1972 |
| Melanthera Rohr, 1792 |
| Melanthera angustifolia A. Rich., 1840 |
| Melanthera aspera (Jacq.) Steud. ex Small, 1909 |
| Melanthera aspera var. glabriuscula (Kuntze) J.C. Parks, 1973 |
| Melanthera deltoidea Michx., 1803 |
| Melanthera hastata Michx., 1803 |
| Melanthera lanceolata Benth., 1853 |
| Melanthera linearis S.F. Blake, 1922 |
| Melanthera microphylla Steetz, 1854 |
| Melanthera nivea (L.) Small, 1903 |
| Melanthera purpurascens S.F. Blake, 1924 |
| Melarhiza Kellogg, 1873 |
| Mendezia DC., 1836 |
| Mendezia bicolor DC., 1836 |
| Menotriche Steetz, 1864 |
| Meratia Cass., 1824 |
| Merope Wedd., 1856 |