| Ischaemum latifolium subsp. hirtivaginum Hitchc., 1927 |
| Ischaemum latifolium var. minus E. Fourn., 1886 |
| Ischaemum latifolium var. oligostachyum Hack., 1889 |
| Ischaemum ophiuroides Munro, 1860 |
| Ischaemum peruvianum (J. Presl) Kunth, 1833 |
| Ischaemum rugosum Gaertn., 1805 |
| Ischaemum rugosum Salisb., 1791 |
| Ischaemum secundatum Walter, 1788 |
| Ischnanthus Roem. & Schult., 1817 |
| Ischurochloa Buse, 1854 |
| Ixophorus Schult., 1861 |
| Ixophorus glaucus (L.) Nash, 1895 |
| Ixophorus glaucus var. laevigata (Muhl. ex Elliot) Chapm. ex Gatt., 1901 |
| Ixophorus palmeri (Vasey) Beetle, 1983 |
| Ixophorus pringlei Scribn., 1897 |
| Ixophorus pringlei var. minor Scribn., 1897 |
| Ixophorus pringlei var. pringlei Scribn., 1897 |
| Ixophorus unisetus (J. Presl) Schltdl., 1862 |
| Ixophorus verticillatus (L.) Nash, 1895 |
| Ixophorus viridis (L.) Nash, 1895 |