U.S. DEPARTMENT OF Guetamaes Ae 
DIVISION OF BOTANY. 
ILLUSTRATIONS OF NORTH AMERICAN GRASSES. 
i‘ V Ont 
GRASSES OF THE SOUTHWEST. 
PLATES AND DESCRIPTIONS 
OF THE 
GRASSES OF THE DESERT REGION OF WESTERN TEXAS, NEW MEXICO, 
ARIZONA, AND SOUTHERN CALIFORNIA. 
By Dr. GEO. VASEY, 
[ i BOTANIST, DEPARTMENT OF AGRICULTURE. 
PUBLISHED BY AUTHORITY OF THE SECRETARY OF AGRICULTURE. 
WASHINGTON : 
GOVERNMENT PRINTING OFFICE. 
1891. 
