43 



If this is true, it would probably also lead to the conclusion that the 

 typical black walnut (Juglans nigra) is biologically higher than any 

 of the species of hickory (Carya) and that the former may be consid- 

 ered as a development from the latter. 



An effort was made to ascertain when the tree was injured and 

 whether any connection could be traced between the injury and the 

 appearance of the abnormal fruit. No information of positive char- 

 acter upon that point seems to be o-btainable. 



The leaves do not seem to differ in any essential from those or- 

 dinarily found on the walnut tree. 



