| Paspalum malacophyllum var. longipilum Hack., 1904 |
| Paspalum malacophyllum var. petiolatum Döll, 1877 |
| Paspalum mayanum Chase, 1934 |
| Paspalum melanospermum Desv. ex Poir., 1816 |
| Paspalum michauxianum Kunth, 1829 |
| Paspalum microstachyum J. Presl, 1830 |
| Paspalum millegrana Schrad., 1824 |
| Paspalum minimum Meyen, 1834 |
| Paspalum minus E. Fourn., 1886 |
| Paspalum minutiflorum Steud., 1855 |
| Paspalum mollifolium Swallen, 1967 |
| Paspalum mononeuron Steud., 1855 |
| Paspalum monostachyum Vasey, 1883 |
| Paspalum monostachyum Willd. ex Steud., 1841 |
| Paspalum montevidense Spreng., 1825 |
| Paspalum mucronatum Muhl., 1817 |
| Paspalum multicaule Poir., 1816 |
| Paspalum multiflorum Desv., 1831 |
| Paspalum mutabile Chase, 1929 |
| Paspalum natans J. Leconte, 1820 |