Meadow Barley: Hordeum brachyantherum (Synonyms: Critesion jubatum ssp. breviaristatum, Hordeum boreale, Hordeum brachyantherum ssp. brachyantherum, Hordeum brachyantherum ssp. californicum, Hordeum jubatum ssp. breviaristatum, Hordeum jubatum var. boreale, Hordeum nodosum, Hordeum nodosum var. boreale)
Dwarf Barley, Low Barley: Hordeum depressum (Synonym: Critesion depressum)
Foxtail Barley, Squirreltail Barley: Hordeum jubatum ssp. jubatum (Synonym: Hordeum jubatum var. jubatum)
Geniculate Barley, Mediterranean Barley: Hordeum marinum ssp. gussoneanum (Synonyms: Critesion geniculatum, Critesion hystrix, Critesion marinum ssp. gussonianum, Hordeum geniculatum, Hordeum gussoneanum, Hordeum hystrix)
Mouse Barley, Smooth Barley: Hordeum murinum ssp. glaucum (Synonyms: Critesion glaucum, Critesion murinum ssp. glaucum, Hordeum glaucum, Hordeum stebbinsii)
Hare Barley, Mouse Barley: Hordeum murinum ssp. leporinum (Synonyms: Critesion murinum ssp. leporinum, Hordeum leporinum)
Wall Barley, Way Barley: Hordeum murinum ssp. murinum (Synonym: Critesion murinum ssp. murinum)
Stebbins' Wheatgrass: xElyhordeum stebbinsianum (Synonym: Elymus glaucus x Hordeum brachyantherum)