| Sporobolus paniculatus (Trin.) T. Durand & Schinz, 1895 |
| Sporobolus patens Swallen, 1941 |
| Sporobolus pilosus Vasey, 1891 |
| Sporobolus plumbeus (Trin.) Hemsl., 1885 |
| Sporobolus poaeoides Hack., 1911 |
| Sporobolus poiretii (Roem. & Schult.) Hitchc., 1932 |
| Sporobolus potosiensis Wipff & S.D. Jones, 1994 |
| Sporobolus pulvinatus Swallen, 1941 |
| Sporobolus pumilus (Roth) P.M. Peterson & Saarela, 2014 |
| Sporobolus purpurascens (Sw.) Ham., 1825 |
| Sporobolus purpurascens (Sw.) Kuhlm., 1922 |
| Sporobolus pyramidalis P. Beauv., 1816 |
| Sporobolus pyramidatus (Lam.) Hitchc., 1936 |
| Sporobolus pyramidatus subsp. domingensis (Trin.) Catasús, 1996 |
| Sporobolus racemosus Vasey, 1887 |
| Sporobolus ramulosus (Kunth) Kunth, 1829 |
| Sporobolus regis I.M. Johnst., 1943 |
| Sporobolus repens J. Presl, 1830 |
| Sporobolus richardsonis (Trin.) Merr., 1902 |
| Sporobolus sabeanus Buckley ex Vasey, 1892 |