| Elymus elymoides | Bottlebrush Squirreltail | Poaceae | E. sitanion Schult. Hordeum elymoides (Raf.) Schenck. Sitanion elymoides Raf. | 2 | 0 |
| Hordeum hexastichon | Six-Row Barley, Common barley | Poaceae | H. vulgare hexastichon. | 3 | 0 |
| Hordeum jubatum | Foxtail Barley, Intermediate barley | Poaceae | | 1 | 1 |
| Hordeum murinum | Mouse Barley, Smooth barley, Hare barley, Wall barley | Poaceae | | 2 | 1 |
| Hordeum vulgare | Barley, Common barley | Poaceae | Frumentum hordeum, Hordeum sativum, Hordeum nigrum, Hordeum durum, Secale orientale | 4 | 3 |