| Aristida adscensionis var. interrupta (Cav.) Beetle, 1974 |
| Aristida adscensionis var. mexicana Hack., 1927 |
| Aristida adscensionis var. modesta Hack., 1904 |
| Aristida adscensionis var. nigrescens (J. Presl) Beetle, 1974 |
| Aristida adscensionis var. normalis Kuntze, 1898 |
| Aristida adscensionis var. scabriflora Hack., 1904 |
| Aristida adscensionis var. typica Stapf, 1897 |
| Aristida aequiramea Scheele, 1849 |
| Aristida affinis (Schult.) Kunth, 1829 |
| Aristida americana L., 1759 |
| Aristida americana var. bromoides (Kunth) Scribn. & Merr., 1901 |
| Aristida antillarum Poir., 1810 |
| Aristida appressa Vasey, 1893 |
| Aristida appressa var. brevior Vasey, 1893 |
| Aristida arizonica Vasey, 1886 |
| Aristida barbata E. Fourn., 1885 |
| Aristida berlandieri (Trin. & Rupr.) Hitchc., 1913 |
| Aristida bromoides Kunth, 1815 |
| Aristida brownii Warnock, 1982 |
| Aristida californica Thurb., 1880 |