| Stipa capillaris Lam., 1791 |
| Stipa cericea Michx. ex Raf., 1825 |
| Stipa cernua Stebbins & Love, 1941 |
| Stipa chapulcensis E. Fourn., 1886 |
| Stipa cilliata Scheele, 1849 |
| Stipa cirrosa E. Fourn., 1885 |
| Stipa clandestina Hack., 1910 |
| Stipa comata Trin. & Rupr., 1842 |
| Stipa constricta Hitchc., 1925 |
| Stipa coronata Thurb., 1880 |
| Stipa coronata var. coronata Thurb., 1880 |
| Stipa coronata var. depauperata (M.E. Jones) Hitchc., 1934 |
| Stipa coronata var. parishii (Vasey) Hitchc., 1925 |
| Stipa curvifolia Swallen, 1933 |
| Stipa demissa Steud., 1854 |
| Stipa diegoensis Swallen, 1940 |
| Stipa diffusa Walter, 1788 |
| Stipa editorum E. Fourn., 1886 |
| Stipa eminens Cav., 1799 |
| Stipa eminens subsp. andersonii (Vasey) A.E. Murray, 1982 |