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CONTRIBUTIONS FROM THE NEW YORK BOTANICAL 

 GARDEN — No. 156 



STUDIES ON THE ROCKY MOUNTAIN 

 FLORA-XXVIII 



By per axel RYDBERG 



NEW YORK 

 1913 



Reprinted, without change of paging, from the Bclletin of the Torrey Botanical Club 



40: 43-74. 18 Mr. 1913 



