| Puccinia angustata Peck, 1873 |
| Puccinia anisacanthi Dietel & Holw., 1901 |
| Puccinia anodae P. Syd. & Syd., 1903 |
| Puccinia antirrhini Dietel & Howl., 1897 |
| Puccinia apocyni Dietel & Holw., 1897 |
| Puccinia appendiculata Libosch., 1817 |
| Puccinia arachidis Speg., 1884 |
| Puccinia arachidis var. arachidis Speg., 1884 |
| Puccinia archibaccharidis J. F. Hennen, Leon-Gallegos & Cummins, 1972 |
| Puccinia arechavaletae Speg., 1881 |
| Puccinia arthuriana H. S. Jacks., 1918 |
| Puccinia arthurii P. Syd. & Syd., 1904 |
| Puccinia atra Dietel & Holw., 1897 |
| Puccinia axiniphylli Arthur, 1905 |
| Puccinia azteca Cummins & J. F. Hennen, 1971 |
| Puccinia baccharidis Dietel & Holw., 1893 |
| Puccinia badia Howl., 1905 |
| Puccinia ballotiflora Long, 1902 |
| Puccinia bella J. F. Hennen & Cummins, 1973 |
| Puccinia berberidis-trifoliae Dietel & Holw., 1901 |