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
, Plants of the World Online accepts 172 species:


 * 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
 * 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.