THE LEAF. 37 



EXERCISE XI. 

 Kinds of Leaves. 



FIG. 56. FIG. 57. FIG. 58. 



<? Pafl ,-ip T P*f Stipulate and Petiolate A Petiolate and Ex- 



ssile Leat Leaf stipulate Leaf. 



A SES'SILE Leaf is a leaf without a petiole. 

 A SIMULATE Leaf is a leaf that has stipules. 

 A PET'IOLATE Leaf is a leaf that has a petiole. 

 An EXSTIP'IJLATE Leaf is a leaf without stipules. 



In Schedule Seven, it will be seen, we have 

 dropped the question Parts 1 and put Kind \ in its 

 place. The words by which you answer this ques- 

 tion are very long, but you can soon learn to handle 

 them, and by-and-by you will find them much more 

 convenient in leaf-description than it will be always 

 to give a list of the parts. 



easily given, but it would be a departure from our essential 

 plan. The work before us the observation of the external 

 characters of plants is itself extensive, and it can only be well 

 done by making it at first our sole occupation. To observe 

 carefully, to repeat our observations till they are familiar, and 

 to acquire the ready and accurate use of the vocabulary of de- 

 scription, are the only true foundation of a knowledge of botany ; 



