DISTEIBUTION OF AMERICAN FORESTS 



Finally, within the eastern forests a 

 restricted region at the southern end of 

 Florida, including the Keys, may prop- 

 erly be separated from the rest. For 

 here is found a distinctively tropical 

 vegetation, differing entirely in char- 

 acter from the forest flora to the north. 

 Many trees indigenous to the West 

 India Islands have established them- 

 selves upon this small area, on which 

 the number of species exceeds that of 

 any region of equal extent within the 

 United States, not excepting even the 

 varied forest growth of the Mexican 

 border line, to which alone it might be 

 worthily compared. 



Separating the forest floras of the 



western and eastern United States, lies 



the broad region of prairies and plains. 



Though trees are found for the greater 



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