APPENDIX G. 



BOTANY. 



DESCRIPTION OF THE PLANTS COLLECTED DURING THE EX- 

 PEDITION : BY DR. JOHN TORREY. 



No. 96, St. Mark's Place, New York, 



August 10, 1853. 



Dear Sir : I have examined the collection of plants that 

 you brought from the headwaters of the Red river, towards 

 the Rocky mountains. The flora of this region greatly resem- 

 bles that of the upper portion of the Canadian. It is remark- 

 able that there occur among your plants several species that 

 were first discovered by Dr. James, in Long's Expedition, 

 and have not been found since until now. Your collection is 

 an interesting addition to the geography of North American 

 plants, and serves to mark more clearly the range of many 

 western species. For particular remarks on the rarer plants, 

 and descriptions of the new species, T refer you to the accom- 

 panying list. 



At your request I have had some of the rarer plants drawn 

 and engraved, to illustrate your report to Congress. 



I am, dear sir, 



Yours truly, 



JOHN TORREY. 



Captain R. B. Marcy. 



\rffoW--vwuii, 



