182 EXPERIMENT STATION. [Jan. 



general terms it may be said that the fruit is modified also. 

 The Marianna stock in particular seems to produce the most 

 obvious changes in the growth of plums worked on it. In the 

 experiments here under observation these changes are as fol- 

 lows : — 



1. Broader leaves. 



2. Finer marginal serrations. 



3. Greater annual growth. 



4. Larger internodes. 



5. Greater diameter of branches. 



6. Greater variability in all characters. 



