| Paspalum sanguinale (L.) Lam., 1791 |
| Paspalum sanguinale var. ciliare (Retz.) Hook. f., 1897 |
| Paspalum sanguinale var. pruiriens (Fisch. ex Trin.) Hook. f., 1897 |
| Paspalum sanguinolentum Trin., 1826 |
| Paspalum savannarum Schltdl., 1854 |
| Paspalum saxatile Salzm. ex Döll, 1877 |
| Paspalum scabrum Scribn., 1897 |
| Paspalum schreberianum (Flüggé) Nash, 1912 |
| Paspalum scoparium Flüggé, 1810 |
| Paspalum scrobiculatum L., 1767 |
| Paspalum scrobiculatum var. orbiculatum Weigelt, 1877 |
| Paspalum secans Hitchc. & Chase, 1917 |
| Paspalum selloi Spreng. ex Nees, 1829 |
| Paspalum sericatum Swallen, 1967 |
| Paspalum sericeum Scheele, 1849 |
| Paspalum serpentinum Hochst. ex Steud., 1855 |
| Paspalum serratum Hitchc. & Chase, 1917 |
| Paspalum setaceum Michx., 1803 |
| Paspalum setaceum var. ciliatifolium (Michx.) Vasey, 1892 |
| Paspalum setaceum var. dispar R. Guzmán, 1982 |