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

 1st Lieut. GEO. M. WHEELER, Corps of Engineers, U. S. Army, in ciiaix-k. 



CHAPTER IV. 







CATALOGUE 



OF 



PLANTS COLLECTED 



IN 



NEVADA, UTAH, COLORADO, NEW MEXICO, AND ARIZONA, 



DESCRIPTIONS OF THOSE NOT CONTAINED IN GRAY'S MANUAL OF THE NORTHERN U. S., 

 AND VOL. V, GEOLOGICAL EXPLORATION OF THE FORTIETH PARALLEL. 



BY 



J. T. ROTH ROCK, 



SURGEON AND BOTANIST TO THE EXPEDITIONS OF 1873, 1874, AND 187.">, 

 AND THE FOLLOWING BOTANISTS: 



SERENO WATSON, Cambridge, Mass. 

 GEORGE ENGELMANN, M. D., St. Louis, Mo. 

 Proi-. THOS C. PORTER, Easton, Penn. 

 M. S. BERB, Fountain-dale, III. 

 WM. BOOTT, Boston, Mass. 



GEORGE VASEY, M. D., Agricultural Depart- 

 ment, Washington, D. C. 



Prof. D. C. EATON, Yale College, New Ha- 

 ven, Conn. 



THOS. P. JAMES, Cambridge, Mass. 



Prof. EDWARD TUCKERMAN, Amherst, Mass. 



