ACID ACCUMULATION IN SUCCULENTS 



267 



TABLE 3 



i 



Showing dry weight (in per cent) and acidity of sap in four samples at different 

 depths from each of seven plants of Echinocactus. Plants 27 to 29 collected June 

 30; Plants 30 to 32 collected July 8; Plant 33 collected July 18 



* Because of heavy rains during the night, which probably affected the plants 

 through the exposed surface, morning analyses were not made. 



in most of the plants studied. For example, the difference in 

 water content of A and B in sahuaro No. 1 is 4.2 per cent (of the 

 wet weight of the plant) at 5 p.m., and only 1.7 per cent at 8 a.m. 



