VARIATION IN LEAVES 



123 



have new interest. The leaves upon the older (or 

 lower parts) are normally entire, but the upper- 

 most ones are distinctly sinuate. A different type 



FlO. 120. 

 Different fonna of leaves on a mulberry branch. 



of variation may be found in the leaves of some 

 kinds of smilax or greenbrier (Fig. 119). The 

 illustration is of a southern species. The pupil 

 should now study the leaves of grape (Figs. 80, 



