CLASSIFICATION. 



203 



Fig.l. 

 Class II. 

 Those whose leaves are crenate or serrulate, having glo- 

 bose glands. Fig 2. 



Fig. 2. 

 Class III. 

 Those whose leaves are crenate or serrulate, having re- 

 niform glands. Fig. 3. 



Fig. 3. 



