| Eragrostis panamensis J. Presl, 1830 |
| Eragrostis panicoides (J. Presl) Steud., 1854 |
| Eragrostis papi Gand., 1919 |
| Eragrostis pappiana (Chiov.) Chiov., 1908 |
| Eragrostis parviglumis Hochst. ex Steud., 1854 |
| Eragrostis parvula Steud., 1854 |
| Eragrostis patula (Kunth) Steud., 1840 |
| Eragrostis pauciflora Trin. ex E. Fourn., 1886 |
| Eragrostis pectinacea (Michx.) Nees, 1841 |
| Eragrostis pectinacea (Michx.) Steud., 1854 |
| Eragrostis pectinacea var. miserrima (E. Fourn.) Reeder, 1986 |
| Eragrostis pectinacea var. pectinacea (Michx.) Nees, 1841 |
| Eragrostis pectinacea var. sparsihirsuta Farw., 1927 |
| Eragrostis pectinacea var. spectabilis (Pursh) A. Gray, 1856 |
| Eragrostis pennsylvanica Scheele, 1844 |
| Eragrostis peregrina Wiegand, 1917 |
| Eragrostis perplexa L.H. Harv., 1954 |
| Eragrostis pilosa (L.) P. Beauv., 1812 |
| Eragrostis pilosa f. multicaulis (Steud.) I.C. Chung, 1955 |
| Eragrostis pilosa subsp. damiensiana (Bonnet) Thell., 1908 |