U.S. DEPARTMENT OF AGRICULTURE. 



DIVISION OF BOTANY. 



BULLETIN ISTo. 12. 



GRASSES OF THE SOUTHWEST. 



PLATES AND DESCRIPTIONS 



OF THE 



GRASSES OF THE DESERT REGION OF WESTERN TEXAS, NEW MEXICO, . 

 ARIZONA, AND SOUTHERN CALIFORNIA. 



Part II. 



By Dr. GEO. VASEY, 



BOTANIST, DEPARTMENT OF AGRICULTURE. 

 ISSUED DECEMBER, 1891. 



PUBLISHED BT AUTHORITY OF THE SECRETARY OF AGRICULTURE. 



WASHINGTON : 



GOVERNMENT PRINTING OFFICE. 



1891, 



