| Sporobolus capillaris Vasey, 1893 |
| Sporobolus capillipes M.E. Jones, 1912 |
| Sporobolus capillipes var. delicatulus M.E. Jones, 1912 |
| Sporobolus coahuilensis Valdés-Reyna, 1978 |
| Sporobolus complanatus Scribn. ex Beal, 1896 |
| Sporobolus compositus (Poir.) Merr., 1901 |
| Sporobolus confusus (E. Fourn.) Vasey, 1888 |
| Sporobolus confusus var. aberrans M.E. Jones, 1912 |
| Sporobolus contractus Hitchc., 1915 |
| Sporobolus copiapinus Phil., 1896 |
| Sporobolus cryptandrus (Torr.) A. Gray, 1848 |
| Sporobolus cryptandrus subsp. fuscicolus (Hook.) E.K. Jones & Fassett, 1950 |
| Sporobolus cryptandrus var. flexuosus (Thurb. ex Vasey) Thurb., 1880 |
| Sporobolus cryptandrus var. giganteus (Nash) E.K. Jones, 1912 |
| Sporobolus cryptandrus var. involutus Farw., 1921 |
| Sporobolus cryptandrus var. occidentalis E.K. Jones & Fassett, 1950 |
| Sporobolus cryptandrus var. robustus Vasey, 1890 |
| Sporobolus cryptandrus var. strictus Scribn., 1882 |
| Sporobolus cryptandrus var. typicus (Torr.) E.K. Jones & Fassett, 1950 |
| Sporobolus cryptandrus var. vaginatus Lunell, 1911 |