| Aristida guineensis Trin. & Rupr., 1842 |
| Aristida gypsophila Beetle, 1981 |
| Aristida gypsophila f. diffusa Allred & Valdés-Reyna, 1997 |
| Aristida gypsophila f. gypsophila Beetle, 1981 |
| Aristida gypsophila f. gypsophiloides Allred & Valdés-Reyna, 1997 |
| Aristida hamulosa Henrard, 1926 |
| Aristida havardii Vasey, 1886 |
| Aristida hintonii Hitchc., 1935 |
| Aristida hitchcockiana Henrard, 1927 |
| Aristida humboldtiana Trin. & Rupr., 1842 |
| Aristida humilis Kunth, 1815 |
| Aristida hypomegas Mez, 1921 |
| Aristida imbricata Henrard, 1927 |
| Aristida interrupta Cav., 1799 |
| Aristida jacquiniana Tausch, 1836 |
| Aristida jacquiniana var. jacquiniana Tausch, 1836 |
| Aristida jacquiniana var. subaequilonga Henrard, 1927 |
| Aristida jaliscana R. Guzmán & V. Jaram., 1982 |
| Aristida jonesii Vasey, 1892 |
| Aristida jorullensis Kunth, 1829 |