PLATE 13. 



Plum tree and fruiting branch showing difterence between number of flowers borne 



and quantity of fruit set: 



A. — The appearance of a plum tree bearing a normal crop of bloom. 



B. — ^A single fruiting branch 2 years old showing the contrast to A. Only 2 fruits 

 have set out of approximately 100 flowers borne by this branch. Note the stubs where 

 flowers have dehisced. 



