CONTEIBUTIONS FROM THE NEW YORK BOTANICAL 

 GARDEN— No. 12. 



STUDIES ON THE ROCKY MOUNTAIN 

 FLORA-IV 



BY P. A. RYDBERG 



NEW YOKK 

 1901 



[Reprinted from the Bulletin of the Toreey Botanical Club. 28 : 20-S8 31 Jan., 1901.J 



