Agropyron desertorum (Clustered wheat grass, Desert crested wheatgrass, Desert wheatgrass, Standard crested wheatgrass; syn. Agropyron cristatum ssp. desertorum (Fisch. ex Link) A. Löve, Agropyron cristatum var. desertorum (Fisch. ex Link) Dorn) is a species in the Poaceae family which was originally from Russian and Siberian steppes until it was introduced to the United States from there between 1907 and 1913.