Cheatgrass is native to Eurasia and the Mediterranean. It was accidentally introduced to the United States in packing material.
Dried seed heads of cheatgrass
Expanse of cheatgrass with dried seed heads
Photo credit: S Dewey/Utah State Univ. (left)
JM Randall/The Nature Conservancy (right)
Whitson TD, ed. 2000. Weeds of the West. Jackson (WY): Western Society of Weed Science. 628 p.