NOTE. 



This Bulletin is to constitute the first half of the first volume of a work 

 entitled " Illustrations of North American Grasses." The work when completed 

 will consist of two volumes, the first entitled "Grasses of the Southwest," the 

 second, "Grasses of the Pacific Si ope." Proper title-pages and indexes will be 

 published with the last part of each volume. 

 2 



