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 P"lletin of the Torrey Botanical 



Club 37: 443-171 . J) & 1910 



