B 



FIG. 29 APPLE TWIGS OF VARIOUS AGES 



A, water sprout, one season old, numerous branch buds. B, shoot from a fruit 

 spur bearing new fruit spurs toward its upper end. Each of these spurs has 

 attempted to produce fruits, but the apples have almost all failed to mature. 

 C, eight-year-old twig whose fruit spurs have made 31 attempts to bear, but have 

 succeeded in maturing fruits only five times, most of the specimens falling before 

 half grown. D, three-year-old shoot with vigorous fruit spurs. E, similar shoot 

 with ono fruit spur which "changed its mind" and became a branch. 



