Elymus trachycaulus (Link) Gould ex Shinners  
Family: Poaceae
slender wheat grass
[Agropyron trachycaulum (Link) Malte ex H.F.Lewis]
Elymus trachycaulus image
from USDA Plants website  
Elymus trachycaulus image
from USDA Plants website  
Elymus trachycaulus image
Robert W. Freckmann  
Elymus trachycaulus image
Emmet J. Judziewicz  
Elymus trachycaulus image