| Stipa lepida Hitchc., 1915 |
| Stipa lepida var. andersonii (Vasey) Hitchc., 1915 |
| Stipa lepida var. lepida Hitchc., 1915 |
| Stipa leucotricha Trin. & Rupr., 1842 |
| Stipa liebmannii E. Fourn., 1885 |
| Stipa linearifolia E. Fourn., 1885 |
| Stipa linearis Swallen, 1940 |
| Stipa lobata Swallen, 1933 |
| Stipa melanocarpa Muhl., 1817 |
| Stipa membranacea Pursh, 1814 |
| Stipa mendocina Phil., 1865 |
| Stipa mexicana Hitchc., 1925 |
| Stipa mucronata Kunth, 1815 |
| Stipa multinodis Scribn. ex Beal, 1896 |
| Stipa neomexicana (Thurb.) Scribn., 1899 |
| Stipa oreophila Speg., 1896 |
| Stipa parishii Vasey, 1882 |
| Stipa parishii var. depauperata M.E. Jones, 1912 |
| Stipa pringlei Scribn. ex Vasey, 1892 |
| Stipa pulchra Hitchc., 1915 |