112 THE BOTANICAL irAGAZT^E. [voi. xxii. No. 2,7. 



mode on 13 and 14- (the number of variates with 12 rays is 

 much smaller in that species than in mine) agree well in these 

 two species, while the accessor^' mode on 18 as seen in A. 

 montana was not observed in my species. The range is some- 

 what greater in both extremities in that species than in mine, 

 which is probablj' partly caused by the difference of the en- 

 viromental conditions. 



Although it may not be quite conclusive to determine from 

 my incomplete data, whether the mode shifts continuously 

 with a change of polygone or not, still the presence of a mods 

 on 16 and a sinus on 15 as generally seen in my figure 

 indicates that a continuous shifting of mode is not very 

 probable, 



[To be continued) 



