Rydberg: Phytogeographical notes 103 



The alpine plants of all classes in the Rocky Mountains number 

 about 250 species. The subalpine plants, which sometimes are 

 found in the alpine region, are if the sedges are added over 100 in 

 number. Hence about 350 species of flowering plants, or between 

 6 and 7 per cent, of the Rocky Mountain species, are growing 

 within the alpine region. 



New York Botanical Garden 



