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BULLETIN 112, U. S. DEPARTMENT OF AGRICULTURE. 
One of the long-awned species, Agropyron spicatum (Pursh) 
Scribn. and Smith {A, divergens Nees), called bunch-grass, or more 
distinctively blue bunch wheat- 
grass, is of especial value as a 
forage grass. It is common in the 
Columbia Basin, where it is one of 
the chief range grasses. The spe- 
cies is distinguished by its erect 
bunchy habit and by the spread- 
ing awns of the lemmas, giving 
the spike a bristly appearance. 
Fig. 43. — Quack-grass, Agropyron repens. Plant, X \ ', spikelet, X 3 ; floret, X 5. 
Two of our species have disarticulating spikes, thus approaching 
Sitanion. These are Agropyron saxicola (Scribn. and Smith) Piper, 
of Washington, and A. scribneri Vasey, a spreading mountain species 
