| Elymus elymoides | Bottlebrush Squirreltail | Poaceae | E. sitanion Schult. Hordeum elymoides (Raf.) Schenck. Sitanion elymoides Raf. | 2 | 0 |
| Hordeum brachyantherum | Meadow barley | Poaceae | Critesion brachyantherum (Nevski) Barkworth & D.R.Dewey. Hordeum jubatum var. boreale (Hitchc.) B.Boivin. Hordeum jubatum subsp. brachyantherum (Nevski) Bondarenko ex Korovina. Hordeum nodosum var. boreale Hitchc. | 2 | 1 |
| Hordeum bulbosum | Bulbous Barley | Poaceae | | 2 | 0 |
| Hordeum deficiens | | Poaceae | | 3 | 0 |
| Hordeum distichon | Two-Rowed Barley | Poaceae | H. vulgare distichon. | 4 | 3 |
| Hordeum hexastichon | Six-Row Barley, Common barley | Poaceae | H. vulgare hexastichon. | 3 | 0 |
| Hordeum intermedium | | Poaceae | | 2 | 0 |
| Hordeum jubatum | Foxtail Barley | Poaceae | Critesion jubatum (L.) Nevski. Elymus jubatus (L.) Link | 1 | 1 |
| Hordeum murinum | Mouse Barley | Poaceae | Critesion murinum (L.) Á.Löve. Hordeum leporinum var. murinum (L.) Lojac. Triticum murale Salisb. Zeocriton murinum (L.) P.Beauv. i, | 1 | 1 |
| Hordeum trifurcatum | Egyptian Barley | Poaceae | | 2 | 0 |
|