Central spikelets: glumes 35-85 mm, strongly spreading at maturity; lemmas awned, awns 35-90 mm.
Hordeum jubatum subsp. jubatum is the more widespread of the two subspecies, extending from eastern Siberia through most of North America to northern Mexico. Native in western and northern portions of the Flora region, it is considered to be adventive in the eastern and southeastern portion of its range. It grows in moist soil along roadsides and other disturbed areas, as well as in meadows, the edges of sloughs and salt marshes, and on grassy slopes.
From Flora of Indiana (1940) by Charles C. Deam
This species has become well established in the northern half of the state, especially in the lake area where it has already become a veritable pest. It is found mostly along roadsides and railroads and in waste places, fallow fields, and pastures. It is extremely doubtful that this species is a native of Indiana. Hansen (Proc. Indiana Acad. Sci. 37: 320. 1928) reported [Hordeum nodosum (= H. brachyantherum)] from Vanderburgh County. He sent me a specimen to have his determination verified. Hansen says: "Found growing abundantly in Vanderburgh County during July." I do not have any data except the county locality, so I have not been able to visit the place to ascertain whether it persists or is spreading. I am including this species in our flora upon his authority. Since this is a western species, it has been introduced here and should be so regarded. [Since no subsequent collections have been made, this species does not appear to have established itself in Indiana.]