THE LEAF. 33 



EXERCISE IX. 

 Forms of Lobes. 



THE most striking difference in lobed leaves is the 

 one seen in contrasting Fig. 46 with Fig. 47. It will 

 be quite enough to ask of young beginners that they 

 report whether the lobes of a leaf are rounded or acute. 



FIG. 46. 



FIG. 47. 



Rounded Lobes. 



Acute Lobes. 



But there may be older pupils who could profit- 

 ably go further in observing the lobes of leaves. They 

 vary much in size and shape, and are rarely all alike 

 upon the same leaf. The lobe at the apex of a leaf 

 is called the Terminal lobe, and is usually unlike all 

 the others. The two lobes at the base are called 

 basal lobes, and these also are usually unlike all the 

 rest ; for any pupils who would desire fuller observa- 

 tions upon lobes, a schedule might be prepared with 

 two additional lines and the two questions, Terminal 2 

 and Basal ? added to the present one. It might be 

 well in such a case to give the number of lobes upon 



