U. S. DEPARTMENT OF AGRICULTURE. 
es DIVISION OF BOTANY. 
BUT ha PN eT 8. 
GRASSES OF THE SOUTHWEST. 
PLATES AND DESCRIPTIONS 
OF THE 
GRASSES OF THE DESERT REGION OF WESTERN TEXAS, NEW MEXICO, 
ARIZONA, AND SOUTHERN CALIFORNIA, 
Part I. 
By Dr. GEO. VASEY, 
BOTANIST, DEPARTMENT OF AGRICULTURE. 
ISSUED OCTOBER 13, 1890. 
MISSOURI 
BOTANICAL 
GARDEN. 
PUBLISHED BY AUTHORITY OF THE SECRETARY OF AGRICULTURE 
WASHINGTON: 
GOVERNMENT PRINTING OFFICE 
1890. 
