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 Slope." Proper title-pages and indexes will he 

 published with the last part of each volume. 

 2 



