| Peltophorus Desv., 1810 |
| Penicillaria Willd., 1809 |
| Penicillaria spicata (L.) Willd., 1809 |
| Peniculus Swallen, 1932 |
| Peniculus angustifolius Swallen, 1932 |
| Pennisetum Rich., 1805 |
| Pennisetum advena Wipff & Veldkamp, 1999 |
| Pennisetum alopecuroides Desv. ex Ham., 1825 |
| Pennisetum americanum (L.) Leeke, 1907 |
| Pennisetum americanum subsp. americanum (L.) Leeke, 1907 |
| Pennisetum americanum subsp. typhoideum (Rich.) Maire & Weiller, 1952 |
| Pennisetum americanum var. spicatum (L.) Tzvelev, 1971 |
| Pennisetum bambusiforme (E. Fourn.) Hemsl. ex B.D. Jacks., 1895 |
| Pennisetum bambusiforme Hemsl., 1885 |
| Pennisetum breve Nees, 1829 |
| Pennisetum cenchroides Rich. ex Pers., 1805 |
| Pennisetum ciliare (L.) Link, 1827 |
| Pennisetum ciliare var. ciliare (L.) Link, 1827 |
| Pennisetum clandestinum Hochst. ex Chiov., 1903 |
| Pennisetum complanatum (Nees) Hemsl., 1885 |