28 



POMOLOGY 



Missouri Pippin produce axillary fruit-buds freely. The 

 short spurs in Fig. 5 are homologous to those in Fig. 4. 

 A third type or rather an advanced stage of spur formation 

 is seen in Fig. 6. In this case, a terminal fruit- 

 bud was formed in 1918 and two secondary shoots 

 arose in 1919 from the cluster base (a), both of 

 which produced fruit-buds. In 1920 the fruit- 

 buds expanded and developed a cluster base at b 

 and bb, and they gave rise to one short secondary 

 growth at c which is a leaf -bud, and two secondary 

 growths at cc and c'c', both of which were leaf- 

 buds although from their size they might have been 

 mistaken for fruit-buds. Thus there is the be- 

 ginning of a "compound spur system" 

 (probably a fruit-spur system) . 

 The Rome Beauty produces a large num- 

 Cn ber of its fruit-buds tenninally, i. e., on the 

 ends of rather long shoots. In fact, this 

 is the characteristic method of production 

 in that variety. Usually the same spur 

 would not fruit annually, 

 but every second or third 

 year, depending on the 

 vigor of the tree. If the his- 

 tory of the branches 

 is traced back on 

 the tree, it will be found that the 

 branch (or spur system) con- 

 FiG.7.— A flower- tinues to elongate and the place 

 cluster base where the flowers or fruits were 

 that has pro- borne is gradually overgrown and ^ 

 tZ'lTl the branch appears straight, ^,^ ,^_,^, 

 long shoot. rather than angular as m the fruit-spur system 

 (Rome apple.) case of the short branched of the apple. 



Tf 



