lt>2 Plants collected during ajournty 



country was traversed with great rapidity, and the party was 

 exposed to great hardships and privations, little opportunity 

 was afforded of making observations, or even of recording all 

 the stations of the plants; and many of the specimens, owing 

 to the same unfavourable circumstances, are injured or in- 

 complete. 



Very few of the new species collected have yet been pub- 

 lished. A considerable number are cursorily mentioned in 

 the account of the Expedition compiled by Dr. James, but 

 their characters are not given. In the summer of 1821, Dr. 

 James communicated to the American Philosophical Society. 

 a catalogue of all the plants collected on the journey, as far 

 as he had then determined them. A large proportion of 

 these were found east of the Mississippi, and are mostly well 

 known species. This catalogue is inserted in vol. 2. new 

 series, of the society's transactions published during the last 

 year. 



The herbarium collected on the expedition, has recently 

 been placed at my disposal, by my friend Dr. James. A few 

 of the new or rare plants which it contained, I described se- 

 veral years since, in two papers published in the first volume 

 of the Annals of the Lyceum. The following catalogue 

 includes only the plants collected west of the Mississip- 

 pi, as it is chiefly these which present much interest to the 

 botanist. In the examination of the specimens, I have been 

 greatly assisted by my learned friend Thomas Nuttall, Esq. 

 who has devoted more attention to the botany of this country 

 than any other individual. This gentleman has not yet pub- 

 lished the plants collected by him during his journey into the 

 Arkansa country in IS] 9, though it is his intention to have 

 his account of them succeed this in a short time. 



Some of the species discovered by Dr. James, were found 

 the year previous by Mr. Nuttall. These I have omitted to 

 describe, as it would be improper to interfere with that gen- 

 tleman's prior discoveries, especially as ne lon 6 since fur- 



