BULLETIN 231] 



WALNUT CULTURE IN CALIFORNIA. 



145 



seedlings retained all their usual characteristics in relation to seedlings 

 from northern California nuts. No effect whatever of environment 

 could be seen in any of these cases. Of the northern California walnuts 

 in the southern part of the State, we know of one considerable planting 



FIG. 11. Young southern California black walnut tree, State School grounds, Whittier. 



near Pasadena where the trees are now old enough to produce quite large 

 crops of nuts. These trees retain all the characteristics of the northern 

 California type in regard to the size of the nuts and the time of foliation 

 and defoliation. 

 3231 



