| Chasmanthieae W.V. Br. & B.N. Smith ex Sánchez-Ken & L.G. Clark, 2010 |
| Chasmanthium Link, 1827 |
| Chasmanthium curvifolium (Valdés-Reyna, Morden & S.L. Hacth) Wipff & S.D. Jones, 1990 |
| Chasmanthium latifolium (Michx.) H.O. Yates, 1966 |
| Chauvinia Steud., 1854 |
| Chennapyrum Á. Löve, 1982 |
| Chilochloa P. Beauv., 1812 |
| Chilochloa ventricosa P. Beauv. ex Steud., 1840 |
| Chimonobambusa Makino, 1914 |
| Chimonobambusa quadrangularis (Franceschi) Makino, 1914 |
| Chloammia Raf., 1825 |
| Chlorides Fisch. ex Regel, 1863 |
| Chloridinae J. Presl, 1830 |
| Chloridoideae Rouy, 1913 |
| Chloridopsis Hack., 1887 |
| Chloris Sw., 1788 |
| Chloris (Pterochloris) A. Camus, 1950 |
| Chloris abyssinica Hochst. ex A. Rich., 1851 |
| Chloris alba J. Presl, 1830 |
| Chloris alba var. aristulata Torr., 1857 |