Poa compressa L.
Canada bluegrass is a widespread, but introduced, North American plant.
Identification: This grass is 12-24" (30-60 cm) high. Its culms (stems) are green or grayish blue, and relatively flat. Leaves are up to 4" (10 cm) × ⅛" (4.5 mm), also bluish in color. In cross section, the leaves may appear fairly flat or V-shaped, and leaf tips are shaped like the keel of a boat. Where they attach to the culm, they wrap around it for a length of about an inch. The stem tips are topped by a flowerhead that is described and drawn as sparse by some sources, and denser by others. It is about 2-5" (5-12 cm) long and 1-2" (2.5-5 cm) around.
Poa compressa at Illinois Wildflowers
Poa compressa on chestofbooks.com
Poa compressa on Vascular Plants of the Gila Wilderness
Poa compressa on ftp-fc.sc.egov.usda.gov (PDF)
Poa compressa on the USDA Forest Service's Fire Effects Information Database
Poa compressa on CalPhotos
Poa compressa on SEINet—the Southwest Environmental Information Network
Poa compressa on eFloras
Poa compressa description by Thomas H. Kent, last updated 25 May 2020.