14 



DWARFED LEAVES AND BUR. 



These are borne on a branch girdled by the bark disease. It has been widely reported that 

 eating nuts from such burs produced symptoms of poisoning in human bemgs, and also 

 that cases of poisoning had occured when squirrels which had fed on such nuts were eaten. 

 There is not evidence, however, to prove either of these suppositions. These persistent, 

 dwarfed burs with their abortive nuts are the most conspicious winter symptom of the 

 disease. (Figure 8.1 



17 



