| Festuca obtusiflora Willd. ex Spreng., 1825 |
| Festuca octoflora Walter, 1788 |
| Festuca octoflora subsp. hirtella Piper, 1906 |
| Festuca octoflora subsp. octoflora Walter, 1788 |
| Festuca octoflora var. aristulata Torr. ex L.H. Dewey, 1894 |
| Festuca octoflora var. glauca (Nutt.) Fernald, 1932 |
| Festuca octoflora var. hirtella (Piper) Hitchc., 1935 |
| Festuca octoflora var. octoflora Walter, 1788 |
| Festuca octoflora var. tenella (Willd.) Fernald, 1932 |
| Festuca oregona Vasey, 1877 |
| Festuca orizabensis E.B. Alexeev, 1981 |
| Festuca ovina L., 1753 |
| Festuca pacifica Piper, 1906 |
| Festuca pacifica var. ciliata (A. Gray) Hoover, 1936 |
| Festuca pacifica var. pacifica Piper, 1906 |
| Festuca pacifica var. simulans Hoover, 1936 |
| Festuca parviflora Elliott, 1816 |
| Festuca patagonica Phil., 1896 |
| Festuca pendulita Spreng., 1825 |
| Festuca perennis (L.) Columbus & J.P. Sm., 2010 |