DIFFERENT FORMS OF LEAVES. 93 



Sometimes they are just the opposite, the 

 narrow part being at the base and the broad 

 part at the tip. Then they are called 

 obovate, obcordate, oblanceolate, or spathulate? 

 which last you can see in Fig. 66. 



Some simple leaves are called reniform* 



Fig/"66. from their likeness in outline to a kidney. 

 Spathulate. ,p. f x- , 



When the stalk does not join the 

 blade or lamina (p. 89) at its margin, 

 but at some part of its under surface 

 within the margin, the leaf is called 

 peltate, * and these leaves are generally 

 circular. You have an example of them Reniform. 

 in the pennywort,! so called because of its rounded 

 leaves like pennies. These simple leaf forms are very 

 various, and in describing them two words are often 

 used together, as ovate lanceolate or linear oblong. 



We will now notice the margins or edges of leaves. 

 A leaf is 



Entire When its margin is neither fringed with hairs, 

 nor interrupted by notches or indentations 



(Fig- 55, P- 83). 



Emarginate When its margin has a notch in it at the 

 top or end of the blade, 



* From the Latin "spat /////</," a broad flat spoon or slice; 

 ren, rents," a kidney ; " pelta," a shield 'or buckler. 



f Hydrocotyle vulgaris. 



