VARIATION IN DIFFERENT PORTIONS OF PLANT. 



37 



Comparing these distributions with those given in table 1, it is at 

 once evident that there is a great similarity. The most frequently- 

 occurring whorls in both cases are those with 9 leaves. The range 

 of variation is practically the same for the primary branches as it is for 



Table 14. — Fi-eqiiency distributions for variation in leaf-number of whorls on 



primary branches. 



the whole plant. In fact, these distributions make it clear that the 

 characteristic features of the variation of the plant as a whole with 

 respect to leaf-number are very largely determined by the primary 

 branches. The same essential similarity as before is observed when 



