CONTRIBUTIONS FROM THE NEW YORK BOTANICAL 



GARDEN— No. 168 



PHYTOGEOGRAPHICAL NOTES ON THE 

 ROCKY MOUNTAIN REGION 



II. ORIGIN OF THE ALPINE FLORA 



P. A. RYDBERG 



NEW YORK 

 1914 



Reprinted, without change of paging, from Bulletin of the Torret Botanical Club 



41: 89-103. 23 Mr 1914 



