U. S. GEOGRAPHICAL SURVEYS WEST OF THE ONE HUNDREDTH MERIDIAN. 

 1st Lieut. GEO. M. WHEELER, Corps of Engineers, U. S. Army, in charge. 



CHAPTER III. 



ITOTBS 



ECONOMIC BOTANY 



J. T. ROTHROOK, 



SURGEON AND BOTANIST TO THE EXPEDITIONS OF 1673, 1874, AND 1875. 



