34 
viz. in the description of the two thousand new species of plants 
discovered during our expedition, and partly determined already 
by our excellent friend M. Willdenow. As almost every spe- 
cies of Cinchona is peculiar to its own region, to its own alti- 
tude on the mountainous declivity of the chain of the Andes, 
it is unavoidably necessary, for the satisfactory treatment of 
the subject, to adjust at least the synonymy of the most impor- 
tant officinal species. I shall certainly make mention of that 
only, which I have bad, the opportunity of observing with my 
own — Spepe EET, 
