| Agropyron smithii var. smithii Rydb., 1900 |
| Agropyron smithii var. typica Waterf., 1949 |
| Agropyron spicatum (Pursh) Scribn. & J.G. Sm., 1897 |
| Agropyron spicatum var. arizonicum (Scribn. & J.G. Sm.) M.E. Jones, 1912 |
| Agropyron spicatum var. molle Scribn. & J.G. Sm., 1897 |
| Agropyron spicatum var. palmeri Scribn. & J.G. Sm., 1897 |
| Agropyron spicatum var. viride Farw., 1920 |
| Agropyron subsecundum (Link) Hitchc., 1934 |
| Agropyron subulatum (Schreb. ex Schweigg. & Körte) Herter, 1940 |
| Agropyron tenerum Vasey, 1885 |
| Agropyron tenerum subsp. magnum (Scribn. & J.G. Sm.) Piper, 1905 |
| Agropyron tenerum subsp. majus (Vasey) Piper, 1905 |
| Agropyron tenerum subsp. trichocoleum Piper, 1905 |
| Agropyron tenerum var. ciliatum Scribn. & J.G. Sm., 1897 |
| Agropyron tenerum var. longifolium Scribn. & J.G. Sm., 1897 |
| Agropyron tenerum var. novae-angliae (Scribn.) Farw., 1920 |
| Agropyron tenerum var. trichocoleum Piper, 1905 |
| Agropyron trachycaulon (Link) hort. ex Steud., 1854 |
| Agropyron trachycaulum (Link) Malte ex H.F. Lewis, 1931 |
| Agropyron trachycaulum f. caninoides (Ramaley) B. Boivin, 1967 |