297 
Northern Mexico: Cactus Vegetation. 
From the central point of distribution, the number of species 
rapidly diminishes in a north and east direction. 
United States. 
ng, 
z ne NT PRE 
. 
t. Mexico. After Contributions 
* 
* 
Distrie 
1a 
U. S. National Herbarium V, Plate LVHIL 
89. Coreus Peeten-aboriginum Engelm. Lower Californ 
F 
