| 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 |
| Jarava Ruiz & Pav., 1794 |
| Jarava arundinacea Willd. ex Steud., 1840 |
| Jarava eriostachya (Kunth) Peñail., 2002 |
| Jarava ichu Ruiz & Pav., 1798 |
| Jarava speciosa (Trin. & Rupr.) Peñail., 2002 |
| Jarava usitata Pers., 1805 |