LEAF-AHiUKGEMENT 



Let us begin, for instance, with the common 

 Lime (Fig. 20). The leaf-stalks are arranged at 

 an angle of about 40 with the branch, and the 

 upper surfaces of the leaves are in the same plane 

 with it. The result is, they are admirably adapted 

 to secure the maximum of light and air. Let us 



FIG. 20. LIME. 



take, for instance, the second or third leaf in Fig. 

 20. They are 4? inches long and very nearly as 

 broad. The distance between the two leaves on 

 (each side is also just 4i inches, so that they ex- 

 ;actly fill up the interval. In Tilia parvifolia the 

 .arrangement is similar, but leaves and internodes 

 are both less; the leaves, say, 1 inch, and the 

 internodes .6. 



