| Sporobolus airoides var. minor (Vasey) Beetle, 1983 |
| Sporobolus airoides var. wrightii (Munro ex Scribn.) Gould, 1949 |
| Sporobolus altissimus Vasey, 1889 |
| Sporobolus altissimus var. minor Vasey, 1889 |
| Sporobolus angustus Buckley, 1862 |
| Sporobolus annuus Vasey, 1887 |
| Sporobolus arenaceus Buckley, 1862 |
| Sporobolus argutus (Nees) Kunth, 1833 |
| Sporobolus argutus f. purpurascens Hack., 1911 |
| Sporobolus argutus var. tuberculatus (Hack.) Hack., 1911 |
| Sporobolus aristatus Rydb., 1901 |
| Sporobolus arkansanus Nutt. ex Vasey, 1892 |
| Sporobolus asper (P. Beauv.) Kunth, 1829 |
| Sporobolus asper var. asper (P. Beauv.) Kunth, 1829 |
| Sporobolus asper var. hookeri (Trin.) Vasey, 1885 |
| Sporobolus asper var. pilosus (Vasey) Hitchc., 1928 |
| Sporobolus aspericaulis Scribn., 1896 |
| Sporobolus asperifolius (Nees & Meyen ex Trin.) Nees & Meyen, 1841 |
| Sporobolus asperifolius var. brevifolius Vasey, 1890 |
| Sporobolus asperifolius var. major Vasey, 1892 |