FLORA 



OF THE 



ROCKY MOUNTAINS 



AND 



ADJACENT PLAINS 



COLORADO, UTAH, WYOMING, IDAHO, 



MONTANA, SASKATCHEWAN, 



ALBERTA, 



AND NEIGHBORING PARTS OF 



NEBRASKA, SOUTH DAKOTA, NORTH 

 DAKOTA, AND BRITISH COLUMBIA 



BY 



P. A. RYDBERG, PH.D. 



Curator, New York Botanical Garden 



NEW^YOBK 



Published by the Author 



1917 



