240 BULLETIN 772, U. S. DEPARTMENT OF AGRICULTURE. 
In these forms the sheaths are smooth. Echinochloa walteri (Pursh) 
Heller is a closely allied native species with hirsute sheaths and long- 
awned spikelets. \ 
All the species of Echinochloa are 4 
grazed by horses and cattle, but 
usually grow in situations where they 
can not well be utilized. 
Fie, 146.—Barnyard grass, Hehinochloa crusgalli. Plant, * 34; two views of spikelet 
and fertile floret, x 10. 
