| Paspalum setaceum var. psammophilum (Nash ex Hitchc.) D.J. Banks, 1966 |
| Paspalum setaceum var. pubiflorum Vasey, 1891 |
| Paspalum setaceum var. setaceum Michx., 1803 |
| Paspalum setaceum var. stramineum (Nash) D.J. Banks, 1966 |
| Paspalum sieberianum Steud., 1855 |
| Paspalum simpsonii Nash, 1897 |
| Paspalum sincoranum Mez, 1921 |
| Paspalum soboliferum Chase, 1927 |
| Paspalum sparsum Chase, 1934 |
| Paspalum squamulatum E. Fourn., 1886 |
| Paspalum stellatum Humb. & Bonpl. ex Flüggé, 1810 |
| Paspalum stellatum f. hirsuta Hack., 1911 |
| Paspalum stellatum var. distachyum Nees, 1829 |
| Paspalum stellatum var. monostachyum Nees, 1829 |
| Paspalum stellatum var. monostachyus Nees, 1829 |
| Paspalum stramineum Nash, 1901 |
| Paspalum stuckertii Hack., 1904 |
| Paspalum sumichrasti E. Fourn., 1886 |
| Paspalum taphrophyllum Steud., 1855 |
| Paspalum tenellum Willd., 1809 |