v& 



ECftNMJ iC OH^Th'OLO SY, 





U. S. DEPARTMENT OF AGRICULTURE. 



DIVISION OF BOTANY. 



BULLETIN N"o. 12. 



GRASSES OF THE (SOUTHWEST. 





PLATES AND DESCRIPTIONS 



GRASSES OF THE DESERT REGION OF WESTERN TEXAS, NEW MEXICO 

 ARIZONA, AND SOUTHERN CALIFORNIA. 



Part I. 



By Dr. GEO. VASEY/V 



BOTANIST, DEPARTMENT OP AGRICULTURE. 



ISSUED OCTOBER 13, 1890. 



PUBLISHED BT AUTHORITY OF THE SECRETARY OF AGRICULTURE. 



HITCHCOCK AND CHASE LIBRARY 

 SMITHSONIAN INSTITUTION 



WASHINGTON: 



GOVERNMENT PRINTING OFFICE. 

 1890. 



