298 



Fig. 594. Agropyron spicatum (Pursh) Scribii. & Smith, Bull. 

 U. S. Dept. Agr., Div. Agios. 3 : 12. 1896. Colorado Blue-stem. 

 Western Wheat-grass. A rigid, upriglit, glaucous perennial 3 

 to 12 dm. high, from creepiugrootstocks, with rather firm, bluish- 

 green leaves, aud straight, beardless spikes 6 to 14 cm. long. 

 Spikelets 7- to 13-llowered, 12 to 20 mm. long, with lanceolate, 

 acuminate-pointed, empty glumes (a), and acute flowering glumes 

 8 to 12 mm. long. Dry or moist soil, Wisconsin to Iowa, and 

 westward to Washington, Texas, aud Arizona. June-September. 



