RYDBERG: PHY APHICAL 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 
