Igo BOTANICAL GAZETTE [SEPTEMBER 
cactus type. Insome specimens no tap root could be distinguished, 
although a better development of the tap root was found in plants 
16 
; 17 
_ Fics. 16, ie 16, vertical extension of plants of Berlandiera lyrata: sical 
growing 1 ft. above arro yo bed; 2. Singha above arroyo bed; fig. 17, 
—— ee ee = Oe a a ee i 
