rydberg: vegetative life zones of rocky mountains 499 



27. The approximate altitudinal limits of the different zones in 

 the south are given below. So also the northern latitudes at 

 which they meet the lowlands, the plains, or the level basins. 



Altitude in New Mexico 

 Zones approximately 



Alpine-arctic 12,000-14,400 ft. 



Subalpine 10,500-12,000 



Montane 9,000-10,500 



Submontane ( ^"^ ^'^'l Hn^T 2'cnn 



1^ Chaparrals 7,000- 7,500 



Upper Sonoran 4,500- 7,000 



Lower Sonoran - 4,500 



