| Imperata caudata (G. Mey.) Trin., 1832 |
| Imperata contracta (Kunth) Hitchc., 1893 |
| Imperata contracta (Kunth) Kuhlm., 1922 |
| Imperata cylindrica (L.) P. Beauv., 1797 |
| Imperata cylindrica (L.) Raeusch., 1797 |
| Imperata cylindrica var. africana (Andersson) C.E. Hubb., 1944 |
| Imperata flexuosa Swallen, 1966 |
| Imperata longifolia Pilg., 1901 |
| Imperata sape (A. St.-Hil.) Andersson, 1855 |
| Indochloa Bor, 1954 |
| Ipnum Phil., 1870 |
| Ipnum mendocinum Phil., 1870 |
| Isachne R. Br., 1810 |
| Isachne (R. Br.) Trin., 1834 |
| Isachne arundinacea (Sw.) Griseb., 1864 |
| Isachne panicea Trin., 1826 |
| Isachne polygonoides (Lam.) Döll, 1877 |
| Isachne pubescens Swallen, 1950 |
| Isachne trachyspermum (Nees) Nees, 1857 |
| Isachneae Benth., 1881 |