Bluebunch wheatgrass (with ponderosa pine in the background); photo by Sarai on Flickr (all rights reserved; used by permission).
Official State Grass of Montana
Montana designated bluebunch wheatgrass (Agropyron spicatum) as the official state grass in 1973 (also the state grass of Washington). All State Plants & Grasses
Other grass species were considered (such as blue grama, western wheatgrass, and rough fescue), but bluebunch wheatgrass is found throughout the state and was finally selected to represent Montana (75 percent of Montana's land is composed of rangeland).