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The Distribution of Forests in Western United States. 



The shaded portions of this map mark the areas originally covered 

 with trees. The true plains extend from north to south along the east- 

 ern border of the Rocky Mountains. On the west, trees are found on 

 the sides of mountains; on the east, they stretch out into the plains 

 along the margins of the streams. Reference to the tribal map shows 

 how the typical group ranges in the open plains while the eastern agri- 

 cultural Village group lives in the partially forested belt. On the west 

 the Plateau group appears to range in the open stretches among the 

 mountains. 



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