| Elymus minor (J.G. Sm.) M.E. Jones, 1912 |
| Elymus neograeus Steud., 1854 |
| Elymus nitidus Vasey, 1886 |
| Elymus occidentalis Scribn., 1898 |
| Elymus orcuttianus Vasey, 1885 |
| Elymus pauciflorus (Schwein.) Gould, 1947 |
| Elymus pauciflorus Lam., 1791 |
| Elymus pauciflorus subsp. laeve (Scribn. & J.G. Sm.) Gould, 1947 |
| Elymus pauciflorus subsp. pseudorepens (Scribn. & J.G. Sm.) Gould, 1949 |
| Elymus pauciflorus subsp. subsecundus (Link) Gould, 1947 |
| Elymus petersonii Rydb., 1909 |
| Elymus philadelphicus L., 1755 |
| Elymus philadelphicus var. hirsutus Farw., 1927 |
| Elymus philadelphicus var. pendulus (Eaton & J. Wright) Farw., 1927 |
| Elymus pilosus (J. Presl) Á. Löve, 1984 |
| Elymus ponticus (Podp.) N. Snow, 2007 |
| Elymus pringlei Scribn. & Merr., 1901 |
| Elymus pubiflorus (J.G. Sm.) Burtt Davy, 1902 |
| Elymus repens (L.) Gould, 1947 |
| Elymus repens subsp. caesius (J. Presl & C. Presl) Soó, 1980 |