# Elymus (plant)

Elymus is a genus of perennial plants with approximately 150 species in the grass family, related to rye, wheat, and other widely grown cereal grains.
Elymus is a cosmopolitan genus, represented by species across all continents of the world. Common names include couch grass, wildrye and wheatgrass.

## Species

As of 2024, Plants of the World Online accepted 173 species and 19 hybrids:
* Elymus abolinii (Drobow) Tzvelev
* Elymus aenaeanus (Hohla & H.Scholz) W.Lippert & Meierott ex Hohla
* Elymus afghanicus (Melderis) G.Singh
* Elymus africanus Á.Löve
* Elymus alaskanus (Scribn. & Merr.) Á.Löve
* Elymus albicans (Scribn. & J.G.Sm.) Á.Löve
* Elymus alienus (Keng) S.L.Chen
* Elymus alpinus L.B.Cai
* Elymus altissimus (Keng & S.L.Chen) Á.Löve ex B.Rong Lu
* Elymus amgensis Tzvelev
* Elymus angsaiensis S.L.Lu & Y.H.Wu
* Elymus angulatus J.Presl
* Elymus angustispiculatus S.L.Chen & G.H.Zhu
* Elymus anthosachnoides (Keng & S.L.Chen) Á.Löve ex B.Rong Lu
* Elymus antiquus (Nevski) Tzvelev
* Elymus × apiculatus (F.A.Tscherning) Barina
* Elymus arcuatus (Golosk.) Tzvelev
* Elymus arizonicus (Scribn. & J.G.Sm.) Gould
* Elymus atratus (Nevski) Hand.-Mazz.
* Elymus bakeri (E.E.Nelson) Á.Löve
* Elymus barbicallus (Ohwi) S.L.Chen
* Elymus barystachyus L.B.Cai
* Elymus × bobrovicus (Kotukhov) Olshanskyi
* Elymus borianus (Melderis) Cope
* Elymus × brachyphyllus (Boiss. & Hausskn.) Á.Löve
* Elymus brevipes (Keng & S.L.Chen) S.L.Chen
* Elymus burchan-buddae (Nevski) Tzvelev
* Elymus buschianus (Roshev.) Tzvelev
* Elymus cacuminis B.Rong Lu & B.Salomon
* Elymus caesifolius Á.Löve ex S.L.Chen
* Elymus caianus S.L.Chen & G.H.Zhu
* Elymus californicus (Bol. ex Thurb.) Gould, California bottlebrush grass
* Elymus canadensis L.
* Elymus caninus (L.) L.
* Elymus caucasicus (K.Koch) Tzvelev
* Elymus cheniae (L.B.Cai) G.H.Zhu
* Elymus churchii J.J.N.Campb.
* Elymus ciliaris (Trin.) Tzvelev
* Elymus clivorum Melderis
* Elymus colorans (Melderis) Á.Löve
* Elymus confusus (Roshev.) Tzvelev
* Elymus cordilleranus Davidse & R.W.Pohl
* Elymus coreanus Honda
* Elymus curtiaristatus (L.B.Cai) S.L.Chen & G.H.Zhu
* Elymus curvatiformis (Nevski) Á.Löve
* Elymus curvatus Piper
* Elymus × czilikensis (Drobow) Tzvelev
* Elymus czimganicus (Drobow) Tzvelev
* Elymus debilis (L.B.Cai) S.L.Chen & G.H.Zhu
* Elymus dentatus (Hook.f.) Tzvelev
* Elymus diversiglumis Scribn. & C.R.Ball
* Elymus dolichatherus (Keng) S.L.Chen
* Elymus dolichorhachis S.L.Lu & Y.H.Wu
* Elymus × dorei (Bowden) Barkworth & D.R.Dewey
* Elymus dorudicus (Assadi) Assadi
* Elymus durus (Keng) S.L.Chen
* Elymus duthiei (Melderis) G.Singh
* Elymus × ebingeri G.C.Tucker
* Elymus edelbergii (Melderis) O.Andersson & Podlech
* Elymus elymoides (Raf.) Swezey
* Elymus erosiglumis Melderis
* Elymus × fedoronchukii Olshanskyi
* Elymus fedtschenkoi Tzvelev
* Elymus festucoides (Maire) Ibn Tattou
* Elymus fibrosus (Schrenk) Tzvelev
* Elymus formosanus (Honda) Á.Löve
* Elymus glaberrimus (Keng & S.L.Chen) S.L.Chen
* Elymus glaucissimus (Popov) Tzvelev
* Elymus glaucus Buckley
* Elymus gmelinii (Trin.) Tzvelev
* Elymus grandis (Keng) S.L.Chen
* Elymus × hansenii Scribn.
* Elymus hirsutus J.Presl
* Elymus hitchcockii Davidse
* Elymus hoffmannii K.B.Jensen & Asay
* Elymus hondae (Kitag.) S.L.Chen
* Elymus hongyuanensis (L.B.Cai) S.L.Chen & G.H.Zhu
* Elymus hordeoides (Suksd.) Barkworth & D.R.Dewey
* Elymus humilis (Keng & S.L.Chen) S.L.Chen
* Elymus hybridus (Keng) S.L.Chen
* Elymus hystrix L.
* Elymus × incertus H.Hartmann
* Elymus × interjacens (Melderis) G.Singh
* Elymus interruptus Buckley
* Elymus intramongolicus (Shan Chen & W.Gao) S.L.Chen
* Elymus ircutensis Peschkova
* Elymus jacquemontii (Hook.f.) Tzvelev
* Elymus jacutensis (Drobow) Tzvelev
* Elymus karakabinicus Kotukhov
* Elymus kasteki (Popov) Sennikov
* Elymus khokhrjakovii Tzvelev
* Elymus kuramensis (Melderis) Cope
* Elymus lancangensis S.L.Lu & Y.H.Wu
* Elymus lanceolatus (Scribn. & J.G.Sm.) Gould
* Elymus laxinodis (L.B.Cai) S.L.Chen & G.H.Zhu
* Elymus lazicus (Boiss.) Melderis
* Elymus leiotropis (Keng) S.L.Chen
* Elymus lenensis (Popov) Tzvelev
* Elymus lolioides (P.Candargy) Melderis
* Elymus longearistatus (Boiss.) Tzvelev
* Elymus longifolius (J.G.Sm.) Gould
* Elymus macgregorii R.E.Brooks & J.J.N.Campb.
* Elymus macrochaetus (Nevski) Tzvelev
* Elymus macrourus (Turcz. ex Steud.) Tzvelev
* Elymus magellanicus (É.Desv.) Á.Löve
* Elymus magnicaespes D.F.Cui
* Elymus magniherbosus Charit.
* Elymus magnipodus (L.B.Cai) S.L.Chen & G.H.Zhu
* Elymus × maltei Bowden
* Elymus margaritae A.V.Agaf., Kobozeva & B.Salomon
* Elymus maroccanus (Font Quer & Pau) Rivas Mart., Molero Mesa, Marfíl & G.Benítez
* Elymus medius Charit.
* Elymus mendocinus (Parodi) Á.Löve
* Elymus × mossii (Lepage) Barkworth & D.R.Dewey
Elymus multisetus (J.G.Sm.) Burtt Davy
* Elymus mutabilis (Drobow) Tzvelev
* Elymus nakaii (Kitag.) S.L.Chen
* Elymus nepalensis (Melderis) Melderis
* Elymus nipponicus Jaaska
* Elymus nodosus (Steven ex Griseb.) Melderis
* Elymus × nothus (Melderis) G.Singh
* Elymus × palmerensis (Lepage) Barkworth & D.R.Dewey
* Elymus panormitanus (Parl.) Tzvelev
* Elymus patagonicus Speg.
* Elymus pendulinus (Nevski) Tzvelev
* Elymus petrovii Tzvelev
* Elymus praeruptus Tzvelev
* Elymus probatovae Tzvelev
* Elymus pseudocaninus G.H.Zhu & S.L.Chen
* Elymus × pseudorepens (Scribn. & J.G.Sm.) Barkworth & D.R.Dewey
* Elymus puberulus (Keng) S.L.Chen
* Elymus pulanensis (H.L.Yang) S.L.Chen
* Elymus pungens (Pers.) Melderis
* Elymus purpurascens (Keng) S.L.Chen
* Elymus qingnanensis S.L.Lu & Y.H.Wu
* Elymus repens (L.) Gould
* Elymus retroflexus B.Rong Lu & B.Salomon
* Elymus rhodopaeus Delip.
* Elymus riparius Wiegand
* Elymus russellii (Melderis) Cope
* Elymus sajanensis (Nevski) Tzvelev
* Elymus × saundersii Vasey
* Elymus × saxicola Scribn. & J.G.Sm.
* Elymus scabridulus (Ohwi) Tzvelev
* Elymus scabrifolius (Döll) J.H.Hunz.
* Elymus scabriglumis (Hack.) Á.Löve
* Elymus schugnanicus (Nevski) Tzvelev
* Elymus sclerophyllus (Nevski) Tzvelev
* Elymus scribneri (Vasey) M.E.Jones
* Elymus semicostatus (Steud.) Melderis
* Elymus serotinus (Keng) Á.Löve ex B.Rong Lu
* Elymus serpentinus (L.B.Cai) S.L.Chen & G.H.Zhu
* Elymus shandongensis B.Salomon
* Elymus shirazicus Assadi
* Elymus shouliangiae (L.B.Cai) S.L.Chen & G.H.Zhu
* Elymus sibinicus Kotukhov
* Elymus sibiricus L.
* Elymus sikkimensis (Melderis) Melderis
* Elymus sinkiangensis D.F.Cui
* Elymus sinoflexuosus S.L.Chen & G.H.Zhu
* Elymus sinosubmuticus S.L.Chen
* Elymus smithii (Rydb.) Gould
* Elymus × spurius (Melderis) G.Singh
* Elymus stebbinsii Gould
* Elymus stenostachyus (Melderis) O.Andersson & Podlech
* Elymus strictus (Keng) S.L.Chen
* Elymus svensonii Church
* Elymus sylvaticus (Keng & S.L.Chen) S.L.Chen
* Elymus tenuis (Buchanan) Á.Löve & Connor
* Elymus tenuispicatus Charit.
* Elymus tenuispicus (J.L.Yang & Y.H.Zhou) S.L.Chen
* Elymus texensis J.J.N.Campb.
* Elymus tibeticus (Melderis) G.Singh
* Elymus tilcarensis (J.H.Hunz.) Á.Löve
* Elymus transhyrcanus (Nevski) Tzvelev
* Elymus trichospicula (L.B.Cai) S.L.Chen & G.H.Zhu
* Elymus troctolepis (Nevski) Tzvelev
* Elymus uralensis (Nevski) Tzvelev
* Elymus × versicolor A.P.Khokhr.
* Elymus villosus Muhl. ex Willd.
* Elymus violaceus (Hornem.) J.Feilberg
* Elymus virginicus L.
* Elymus viridulus (Keng & S.L.Chen) S.L.Chen
* Elymus vulpinus Rydb.
* Elymus wawawaiensis J.R.Carlson & Barkworth
* Elymus yangiae B.Rong Lu
* Elymus yubaridakensis (Honda) Ohwi
* Elymus × yukonensis (Scribn. & Merr.) Á.Löve
* Elymus yushuensis (L.B.Cai) S.L.Chen & G.H.Zhu
* Elymus zadoiensis S.L.Lu & Y.H.Wu
* Elymus zejensis Prob.
* Elymus zhui S.L.Chen

### Older classifications

Many species once considered members of Elymus are now regarded as better suited to other genera: Agropyron, Anthosachne, Brachypodium, Cenchrus, Crithopsis, Heteranthelium, Jouvea, Kengyilia, Leymus, Psathyrostachys, Stenostachys, Taeniatherum, Thinopyrum etc.