| Cenchrus pallidus E. Fourn., 1885 |
| Cenchrus palmeri Vasey, 1889 |
| Cenchrus parviceps Shinners, 1956 |
| Cenchrus parviflorus Poir., 1804 |
| Cenchrus pauciflorus Benth., 1844 |
| Cenchrus pauciflorus var. longispinus (Hack.) Jansen & Wacht., 1949 |
| Cenchrus pauciflorus var. muricatus Caro & E.A. Sánchez, 1967 |
| Cenchrus pauciflorus var. pauciflorus Benth., 1844 |
| Cenchrus pedicellatus (Trin.) Morrone, 2010 |
| Cenchrus pilosus Kunth, 1815 |
| Cenchrus polystachios (L.) Morrone, 2010 |
| Cenchrus prolificus (Chase) Morrone, 2010 |
| Cenchrus pubescens L. ex B.D. Jacks., 1912 |
| Cenchrus pungens Kunth, 1815 |
| Cenchrus purpureus (Schumach.) Morrone, 2010 |
| Cenchrus retusus Sw., 1788 |
| Cenchrus rigidus Willd. ex Döll, 1877 |
| Cenchrus roseus E. Fourn., 1886 |
| Cenchrus rufescens Desf., 1799 |
| Cenchrus scabridus Arechav., 1897 |