U. S. DEPARTMENT OF AGRICULTURE. 
DIVISION OF BOTANY. 
BULLETIN No. Le. 
GARDEN. 
PLATES AND DESCRIPTIONS 
“es THE s 
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. 
