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Bottlebrush Squirreltail, California Squirreltail, Squirreltail, Squirreltail Grass: Elymus elymoides ssp. elymoides (Synonyms: Elymus elymoides ssp. californicus, Elymus elymoides var. californicus, Elymus elymoides var. elymoides, Sitanion hystrix var. californicum, Sitanion hystrix var. hystrix)
Squirreltail, Squirreltail 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 ssp. jepsonii, Elymus glaucus var. breviaristatus, Elymus glaucus var. glaucus, Elymus glaucus var. jepsonii, Elymus glaucus var. tenuis)
Streambank Whetatgrass, Thickspike Wheatgrass: Elymus lanceolatus ssp. lanceolatus (Synonyms: Agropyron dasystachyum, Agropyron dasystachyum var. dasystachyum, Agropyron dasystachyum var. riparium, Agropyron lanceolatum, Agropyron riparium, Agropyron subvillosum)
Big Squirreltail: Elymus multisetus (Synonym: Sitanion jubatum)
Creeping Wildrye, Quackgrass: Elymus repens (Synonyms: Agropyron caesium, Agropyron repens, Agropyron repens var. subulatum, Elytrigia repens, Elytrigia repens var. repens, Elytrigia repens var. vaillantiana, Elytrigia vaillantiana, Triticum repens, Triticum vaillantianum)
Saunder's Wildrye: Elymus xsaundersii (Synonyms: xAgrositanion saundersii, Agropyron saundersii)
Alpine Bearded Wheatgrass: Elymus trachycaulus ssp. subsecundus (Synonyms: Agropyron caninum var. unilaterale, Agropyron subsecundum, Agropyron trachycaulum var. glaucum, Agropyron trachycaulum var. unilaterale)
Slender Wheatgrass: Elymus trachycaulus ssp. trachycaulus (Synonyms: Agropyron caninum var. andinum, Agropyron pauciflorum, Agropyron secundum, Agropyron secundum var. andinum, Agropyron tenerum, Agropyron trachycaulum var. trachycaulum, Agropyron violaceum var. andinum)
Blue Wildrye, Giant Wildrye, Great Basin Lymegrass: Leymus cinereus (Synonyms: Aneurolepidum piperi, Elymus cinereus, Elymus cinereus var. cinereus, Elymus cinereus var. pubens, Elymus condensatus, Elymus condensatus var. condensatus, Elymus condensatus var. pubens, Elymus piperi)
Sand Wildrye, Yellow Wildrye: Leymus flavescens: (Synonyms: Elymus arenicola, Elymus flavescens, Leymus arenicola)
Hybrid Wildrye: Leymus flavescens x Leymus triticoides
Beardless Wildrye, Creeping Wildrye: Leymus triticoides (Synonyms: Elymus triticoides, Elymus triticoides var. pubescens, Elymus triticoides var. triticoides)
Vancouver Wildrye: Leymus xvancouverensis (Synonym: Elymus vancouverensis)
Medusahead, Medusahead Wildrye: Taeniatherum caput-medusae (Synonym: Elymus caput-medusae)