Hordeum distichon

Hordeum distichon, the common barley or two-rowed barley, is a cultigen of barley, family Poaceae. It is native to Iraq, and is widely grown throughout temperate regions of the world.^[1] Some authorities consider it a subspecies of six-rowed barley, Hordeum vulgare.^[2] It is the principal raw material for malting and brewing beer in Europe, as it is lower in protein than the six-rowed barley usually used in North America.^[3]

Hordeum distichon
In a farmfield in Japan
Botanical illustration
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Monocots
Clade:	Commelinids
Order:	Poales
Family:	Poaceae
Subfamily:	Pooideae
Genus:	Hordeum
Species:	H. distichon
Binomial name
Hordeum distichon L.
Synonyms[1]
List Hordeum anglicum Gand. Hordeum bohemicum R.E.Regel Hordeum chevalieri R.E.Regel Hordeum colchicum R.E.Regel Hordeum deficiens Steud. ex A.Braun Hordeum distichon convar. nudum (L.) Tzvelev Hordeum distichon convar. zeocriton (L.) Tzvelev Hordeum elisabethpolense R.E.Regel Hordeum eriwanense R.E.Regel Hordeum europaeum R.E.Regel Hordeum germanicum R.E.Regel Hordeum glabrum R.E.Regel Hordeum imberbe Ard. ex Roem. & Schult. Hordeum irregulare Åberg & Wiebe Hordeum kentii R.E.Regel Hordeum korshinskianum R.E.Regel Hordeum laxum R.E.Regel Hordeum lenkoranicum R.E.Regel Hordeum macrolepis A.Braun Hordeum monticola R.E.Regel Hordeum nudideficiens R.E.Regel Hordeum praecocius R.E.Regel Hordeum princeps R.E.Regel Hordeum richardsonii R.E.Regel Hordeum scandinavicum R.E.Regel Hordeum suecicum R.E.Regel Hordeum turkestanicum R.E.Regel Hordeum vilmorianum R.E.Regel Hordeum volhynicum R.E.Regel Hordeum vulgare subsp. deficiens (Steud. ex A.Braun) Á.Löve Hordeum vulgare subsp. distichon (L.) Körn. Hordeum werneri R.E.Regel Hordeum wolgense R.E.Regel Hordeum zeocriton L. Zeocriton commune P.Beauv. Zeocriton distichon (L.) P.Beauv. Zeocriton vulgare Gray