108 LEAF-ARRANGEMENT. 



nearly at right angles to them. The buds, also, 

 are comparatively few, and the internodes, conse- 

 quently, at greater distances apart, sometimes as 

 much as a foot, though the two or three at the 

 end of a branch are often quite short. The gen- 



FIG. 28. HORSECHESTNUT. 



eral habit is shown in Figs. 27 and 28. Now, if 

 we were to imagine six Beech or Elm leaves on 

 these three internodes, it is obvious that the leaf- 

 surface would be far smaller than it is at present. 

 Again, if we compare the thickness of an average 

 Sycamore stem, below the sixth leaf, with that of 



