CONTENTS. 



IX. Census or Summaries of Orders. 



1. Collective census of orders 



2. Distributive census of orders . 



3. Climatal census of orders 



4. Explanations of tlie 'summaries' . 



PA(i E 



359 

 362 

 365 

 367 



X. General Remarks. 



1. Phylo-geograpliical definitions 



2. On Floral Areas .... 



3. Flora of Britain .... 



1. Signification of the term ' flora 



2. Geographical AflSnities 



3. Number of Species 



4. Proportion of Species to Orders an 

 6. Numerical value of the Orders 



4. Vegetation of Britain . . 



5. Ine(|ualities of Distribution, — areas and 



1. Floral Diversities . 



2. Distributive Diversities 



3. Geographical limits of Species 



4. How are the Inequalities to be ex 



6. Local Species 



7. Relation of Plants to Longitude 



8. Relation of Plants to Latitude 



9. Relation of Plants to Altitude 



10. Relation of Plants to Climate 



11 . Arrangement into Climatal Zones 



12. Arrangement into Types of Distribution 



d Genera 



census 



plained .'' 



372 



376 



m4 



384 

 3S5 

 393 

 396 

 400 

 412 

 427 

 427 

 431 

 435 

 438 

 443 

 446 

 453 

 460 

 471 

 482 

 499 



Postscript 



520 



