85 [ 174 ] 



eral species ofpinus,- frasera speciosa, Hook. ; dodecatheon dcntatum, Hook. ; phlox muscoides, 

 Nutt. ; senecio Fremonlii, n. sp., Torr. and Gr. ; four or five asters, and vaccinium myrtilloides, 

 Mx. ; the last seven or eight very near the snow line. Lower down the mountain were found 

 arnica angustifolia, Vahl. ; senecio triangularis, Hook. ; S. subnudus, DC. ; macrorhynchus 

 troximoidcs, Torr. and Gr. ; helianthella unifiora, Torr. and Gr. ; and linosyris viscidijlora, 

 Hook. 



The expedition left the Wind river mountains about the 18th of August, returning by the same 

 route as that by which it ascended, except that it continued its course through the whole length of 

 the Lower Platte, arriving at its junction with the Missouri on the 1st of October. 



As the plants of Lieutenant Fremont were under examination while the last part of the Flora of 

 North America was in the press, nearly all the new matter relating to the Compositae was inserted 

 in that work. Descriptions of a few of the new species were necessarily omitted, owing to the 

 report of the expedition having been called for by Congress before I could finish the necessary analyses 

 and comparisons. These, however, will be inserted in the successive numbers of the work to 

 which I have just alluded. 



JOHN TORREY. 



New York, March, 1843. 



