INTERESTING FORMS OF DESERT PLANT LIFE. 



193 



So full of water is one of these caeti ert. Only animals driven by a com- 



that it is commonly called "the desert pelling desperation of hunger and thirst 



water barrel." have courage to run the gauntlet of 



I laving provided themselves with their formidable armor. Harpoons, 



A VERITABLE VEGETABLE PORCUPINE— THE "NIPPLE CACTUS. 



water and food enough to sustain life 

 it next behooves each one to protect well 

 its precious hoard. And how well pro- 



thorns, barbs, prickles and spines by the 

 thousands lacerate and sting unmerci- 

 fullv whatever invader makes bold 



tected are these fierce plants of the des- enough to despoil their treasure. But 



