CONTRIBUTIONS FROM THE NEW YORK BOTANICAL 

 GARDEN— No. 137 



STUDIES ON THE ROCKY 

 MOUNTAIN FLORA-XXIII 



By per axel RYDBERG 



NEW YORK 

 1910 



Reprinted, without change of paging, from the Bulletin of thkTorrky Botanical 

 Club 37: 443-471. 5 01910 



