CANNON 



PLATE 2 



Dorsal surface of leaves of Juglans nigra, which was growing near the Sebastopol, California, 

 ranch of Luther Burbank. The leaves were selected to show the extreme variation in 

 size and number of leaflets, and size of leaves. The basal pair of leaflets in the figure to 

 the right are only partly shown. One-third natural size. 



