The Genus Elymus

Squirreltail: Elymus elymoides ssp. brevifolius (Synonyms: Elymus elymoides var. brevifolius, Elymus longifolius, Sitanion ciliatum, Sitanion hystrix var. brevifolilum, Sitanion longifolium, Sitanion velutinum)

Bottlebrush Squirreltail, Squirreltail: Elymus elymoides ssp. elymoides (Synonyms: Elymus sitanion, Sitanion elymoides, Sitanion hystrix var. hystrix)

Squirreltail: Elymus elymoides ssp. hordeoides (Synonyms: Elymus hordeoides, Sitanion hordeoides, Sitanion hystrix var. hordeoides)

Blue Wildrye, Western Wildrye: Elymus glaucus ssp. glaucus (Synonyms: Elymus glaucus var. breviaristatus, Elymus glaucus var. glaucus, Elymus glaucus ssp. jepsonii)

Jepson's Blue Wildrye: Elymus glaucus ssp. jepsonii (Synonyms: 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)

Quackgrass: Elymus repens (Synonym: Agropyron repens, Elytrigia repens, Elytrigia repens var. repens, Elytrigia repens var. vaillantiana)

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)

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)