| Puccinia cinnamomea Dietel & Holw., 1897 |
| Puccinia circumdata Mains, 1935 |
| Puccinia cirsii Lasch, 1859 |
| Puccinia clintonii Peck, 1876 |
| Puccinia cnici-oleracei Pers., 1823 |
| Puccinia cognata P. Syd. & Syd., 1902 |
| Puccinia colata J. F. Hennen & Cummins, 1973 |
| Puccinia commelinae Holw., 1904 |
| Puccinia conjuncta Dietel & Holw., 1901 |
| Puccinia conoclinii Seym., 1885 |
| Puccinia convolvuli (Pers.) Castagne, 1842 |
| Puccinia corteziana Cummins & J. F. Hennen, 1971 |
| Puccinia crassipes Berk. & M. A. Curtis, 1874 |
| Puccinia cupheae Holw., 1904 |
| Puccinia cynodontis Desm. ex Fuckel, 1859 |
| Puccinia cyperi Pers., 1891 |
| Puccinia decora Dietel & Holw., 1898 |
| Puccinia delicatula (Arthur) Sacc. & Trotter, 1912 |
| Puccinia desmanthodii Dietel & Holw., 1901 |
| Puccinia dietelii Sacc. & P. Syd., 1899 |