Hybrid Wild-rye: Elymus x hansenii (Synonyms: Elymus glaucus x elymoides or multisetus, xElysitanion hansenii, Sitanion anomalum, Sitanion hanseni, Sitanion hansenii) -
Longleaf Squirreltail: Elymus elymoides ssp. brevifolius (Synonym: Sitanion hystrix var. brevifolium) -
Squirreltail, Squirrel-tail Grass, Bottlebrush Squirreltail, Bottle-brush Squirreltail: Elymus elymoides ssp. elymoides (Synonyms: Elymus cinereum, Elymus sitanion, Sitanion elymoides, Sitanion glabrum, Sitanion hystrix, Sitanion hystrix var. hystrix, Sitanion rigidum) -
Squirrel-tail Grass: Elymus elymoides ssp. hordeoides (Synonyms: Elymus hordeoides, Sitanion hordeoides, Sitanion hystrix var. hordeoides) -
Blue Wildrye, Jepson's Blue Wildrye, Western Wildrye: Elymus glaucus ssp. glaucus (Synonyms: Elymus glaucus var. breviaristatus, Elymus glaucus var. glaucus, Elymus glaucus ssp. jepsonii, Elymus glaucus var. jepsonii, Elymus glaucus var. tenuis) -
Bearded Wheatgrass: Elymus trachycaulus ssp. trachycaulus (Synonyms: Agropyron ×brevifolium, Agropyron caninum ssp. majus, Agropyron caninum var. majus, Agropyron pauciflorum, Agropyron pauciflorum ssp. majus, Agropyron pauciflorum ssp. novae-angliae, Agropyron pauciflorum ssp. teslinense, Agropyron pauciflorum var. novae-angliae, Agropyron tenerum, Agropyron teslinense, Agropyron trachycaulum var. majus, Agropyron trachycaulum var. novae-angliae, Elymus pauciflorus, Elymus trachycaulus ssp. novae-angliae, Elymus trachycaulus ssp. teslinensis, Elymus trachycaulus var. majus, Roegneria pauciflora) -
Arctic Wheatgrass, Bearded Wheatgrass: Elymus violaceus (Synonyms: Agropyron caninum var. hornemannii, Agropyron caninum var. latiglume, Agropyron latiglume, Agropyron trachycaulum var. latiglume, Agropyron violaceum, Agropyron violaceum var. alboviride, Elymus alaskanus ssp. latiglumis, Elymus trachycaulus ssp. latiglumis, Elymus trachycaulus ssp. violaceus, Elymus trachycaulus var. latiglumis, Roegneria violacea) -