| Cortaderia Stapf, 1897 |
| Cortaderia argentea (Nees) Stapf, 1897 |
| Cortaderia dioica Speg., 1902 |
| Cortaderia selloana (Schult. & Schult. f.) Asch. & Graebn., 1900 |
| Costia Willk., 1858 |
| Costia cristata (L.) Willk., 1858 |
| Cottea Kunth, 1829 |
| Cottea pappophoroides Kunth, 1829 |
| Cotteinae Reeder, 1965 |
| Craepalia Schrank, 1789 |
| Craepalia (Schrank) Dumort., 1823 |
| Critesion Raf., 1819 |
| Critesion (Raf.) Nevski, 1941 |
| Critesion adscendens (Kunth) Á. Löve, 1984 |
| Critesion arizonicum (Covas) Á. Löve, 1980 |
| Critesion brachyantherum (Nevski) Barkworth & D.R. Dewey, 1985 |
| Critesion depressum (Scribn. & J.G. Sm.) Á. Löve, 1980 |
| Critesion glaucum (Steud.) Á. Löve, 1984 |
| Critesion hystrix (Roth) Á. Löve, 1984 |
| Critesion jubatum (L.) Nevski, 1934 |