| Eragrostis scabra Phil., 1860 |
| Eragrostis scribneriana Hitchc., 1913 |
| Eragrostis secundiflora J. Presl, 1830 |
| Eragrostis secundiflora subsp. oxylepis (Torr.) S.D. Koch, 1978 |
| Eragrostis secundiflora subsp. secundiflora J. Presl, 1830 |
| Eragrostis secundiflora var. capitata (E. Fourn.) Beetle, 1983 |
| Eragrostis sessilispica Buckley, 1862 |
| Eragrostis silveana Swallen, 1932 |
| Eragrostis simpliciflora (J. Presl) Steud., 1854 |
| Eragrostis soratensis Jedwabn., 1924 |
| Eragrostis spectabilis (Pursh) Steud., 1840 |
| Eragrostis spectabilis var. spectabilis (Pursh) Steud., 1840 |
| Eragrostis spicata Vasey, 1891 |
| Eragrostis sporoboloides J.G. Sm. & Bush, 1895 |
| Eragrostis squarrosa E. Fourn., 1886 |
| Eragrostis superba Peyr., 1860 |
| Eragrostis swallenii Hitchc., 1933 |
| Eragrostis tenella (L.) P. Beauv. ex Roem. & Schult., 1817 |
| Eragrostis tenella var. plumosa (Retz.) Stapf, 1897 |
| Eragrostis tenella var. viscosa (Retz.) Stapf, 1896 |