| Paspalum pygmaeum var. genuinum Hack., 1912 |
| Paspalum pygmaeum var. glabrescens Hack., 1912 |
| Paspalum pygmaeum var. pygmaeum Hack., 1912 |
| Paspalum pyramidale Nees, 1829 |
| Paspalum quadrifarium Lam., 1791 |
| Paspalum quadrifarium var. elongatum (Griseb.) Hack., 1904 |
| Paspalum racemosum Nutt., 1837 |
| Paspalum ramosissimum Nees, 1829 |
| Paspalum ramosum Swallen, 1967 |
| Paspalum raunkiaerii Mez, 1917 |
| Paspalum remyi Steud., 1855 |
| Paspalum renggeri Steud., 1855 |
| Paspalum repens P.J. Bergius, 1762 |
| Paspalum repens var. fluitans (Elliott) Wipff & S.D. Jones, 1994 |
| Paspalum rigens Swallen, 1967 |
| Paspalum robustum Link ex Steud., 1841 |
| Paspalum rosei Scribn. & Merr., 1901 |
| Paspalum rudimentosum Steud., 1853 |
| Paspalum saccharoides Nees ex Trin., 1828 |
| Paspalum saltense Arechav., 1894 |