CONTRIBUTIONS FROM THE NEW YORK BOTANICAL 



GARDEN— No. 156 



STUDIES ON THE ROCKY MOUNTAIN 

 FL0RA-XXVI1I 



By PER AXEL RYDBERG 



NEW YORK 

 1913 



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



40: 43-74. 18 Mr. 1913 



