44 
great family of Rubiacee. We see that as Caoutchouc* is obtained 
im abundance from the juices of the most diversified plants on 
the Orinoco and in Cayenne ; from the Hevea on the Canno Pj- 
michin, a branch of the Negro; from the tree Jacio in the 
Kingdom of New Granada; from a new species of Ficus in the 
province of Popayan, near the Indian village La Cruz; from a 
Lobelia (to be described by us) in Bengal; from the Urecola elas- 
fica, figured in the 5th volume of Asiatic Researches ; in Mada- 
gascar, from the Commiphora madagascarensis: so does nature 
also offer to us the ague-curing principle, or that mixture con- 
taining tannin and absorbing oxygene, which we obtain of a pre- 
ferable quality from Cinchona Condaminea, C. pubescens, Vahl. 
and C’. lancifolia, Mut. in plants»which do not even belong to 
one and the same genus. A chemist would perhaps find greater 
differences between the West-Indian and South-American Cinz 
chona barks, than between the Cuspa of Cumana and the Cin-- 
chona bark of Loxa; and yet the Cuspa tree, foliis alternis, 
stipulis nullis, is most probably a very remote genus from Cin- 
After we have separated with care, partly what in a botani- 
cal point of view is nearly related to Cinchona, partly what 
passes in commerce amongst different nations by the name of 
China, Cascarilla, Quinquina, or Ecorce fébrifuge ; after we have 
separated the Cinchonz with inclosed filaments, not growing 
from the lower end of the flower tube with divided stigma and 
indented margins of the seeds, from the Island-Cinchona, whose 
long projecting filaments gro v from the bottom of the flower 
tube, and which have, together with unindented seed wings, an 
* The Cecropia peltata is frequently mentioned as a tree yielding a part the: Ameen 
caoutchouc. But I doubt whether any part of the new continent makes use of a juice so dif- 
ficult to iuspissate, en Os : sie 
