New Genera of ‘Composite. 105 
attempt to delineate Mr. Fremont’s particular route, as the 
whole account of his perilous journey will soon be given to 
the public in an official report, which, doubtless, will even 
exceed in interest the graphic narrative of his earlier journey 
to the Wind River Chain of the Rocky Mountains... Suffice 
it to say, that having explored the country about the Great 
Salt Lake, and gathered a rich scientific harvest in that 
singular and hitherto unvisited region, he attempted to cross 
the Rocky Mountains in mid-winter, to the head-waters of the 
Arkansas River. Baffled in this attempt, his provisions ex- 
hausted, and, I add with deep regret, having lost by sad mis- 
haps his most interesting botanical collections, he was obliged 
to fall back to the settlements on the Rio Sacramento for sup- 
plies. He then rapidly recrossed the Californian and the 
Rocky Mountains to the Arkansas, through a region of the 
highest scientific interest, and reached St. Louis, we believe, 
in June last. His botanical collections were doomed to fur- 
ther mishaps, by storm and flood, during the latter part of 
the journey; so that his friend and our distinguished asso- 
ciate, Dr. Torrey, received only the débris of a collection of 
dried plants, which, considering the circumstances of the un- 
dertaking and the fact that researches in natural history were 
merely incidental to the main design of Mr. Fremont's tour, — 
E 
Was originally of wonderful extent as well as richness. T b 
Composite of this collection have been kindly submitted to 
me for examination. - it, as some months must elapse be- 
ore a description of the new species will appear in the forth- 
Coming part of the Flora of North America, by Dr. Torrey 
and myself, I have deemed it proper to notice, in the present 
: a few novelties in this family, which, in the course of a 
vig examination, have arrested my attention. 
Among the plants of the Asteroid tribe, I notice a new 
Species of a very marked and characteristic genus of the 
! Report : i Missouri River and 
p Port on an Exploration of the country lying between the pou 
the Rocky Mountains, on the line of the Kan and Great Platte Rivers. 1843. 
Senate Document, No. 243. 
