| Megastachya swainsonii Raddi, 1823 |
| Megastachya thalassica (Kunth) Roem. & Schult., 1817 |
| Megastachya uninervia J. Presl, 1830 |
| Megathyrsus (Pilg.) B.K. Simon & S.W.L. Jacobs, 2003 |
| Megathyrsus maximus (Jacq.) B.K. Simon & S.W.L. Jacobs, 2003 |
| Melica L., 1753 |
| Melica (Bromelica) Thurb., 1880 |
| Melica alba Hitchc., 1913 |
| Melica anomala Scribn. ex Beal, 1896 |
| Melica colpodiodes Nees, 1838 |
| Melica curtipendula Michx. ex Steud., 1821 |
| Melica fluitans (L.) Raspail, 1825 |
| Melica frutescens Scribn., 1885 |
| Melica imperfecta Trin., 1836 |
| Melica imperfecta var. flexuosa Bol., 1870 |
| Melica imperfecta var. imperfecta Trin., 1836 |
| Melica imperfecta var. minor Scribn., 1885 |
| Melica imperfecta var. pubens Scribn., 1901 |
| Melica imperfecta var. refracta Thurb., 1880 |
| Melica mexicana Link ex E. Fourn., 1876 |