160 BOTANICAL ANALYSIS. 



5L'l. Orders or Families succeed to the Cohorts. The 

 Natural Order is perhaps the most important of all the associa- 

 tions. On the accuracy and distinctness of the characters of 

 these groups botanists have bestowed the highest degree of at- 

 tention, and the student's progress will largely depend upon his 

 acquaintance with them. 



522. Orders are formed by associating together those genera 

 which have the most intimate relations to each other, or to some 

 one genus previously assumed as the type. As species form 

 genera, so genera form Orders. In regard to extent, they differ 

 widely ; some consisting of a single genus, as Platanaceae, while 

 others comprehend hundreds of genera, as Composite. For 

 convenience in analysis, the larger Orders are broken up into 

 Sub-orders or Tribes. 



523. The Natural System, then, with all its divisions, groups, 

 and subordinations, may be exhibited at one view, as follows : 



The VEGETABLE KINGDOM consists of 



TWO SUB-KINGDOMS, 



Four PROVINCES, 

 Six CLASSES, 



Thirteen COHORTS, with Alliances, 



300 ORDERS, with Sub-orders and Tribes, 

 20,000 GENERA, with Sub-genera, 

 100,000 SPECIES, with Varieties, and 

 Finally, of INDIVIDUALS. 



CHAPTER III. 



BOTANICAL ANALYSIS 



IB the application of the rules and principles of botany to the 

 study of the natural plant, in order to determine its place in the 

 system, its names, history, uses all that is on record concern- 

 ing it. 



524. In the flowering months the learner will constantly meet 

 with new forms of bloom ; and if he is duly interested in the 



