118 
AMERICAN BLACK POPLAR. 
cotton, and the young buds are coated with a resinous, aromatic substance 
of an agreeable odor. 
In the atlantic States this Poplar is rare and has received no specific 
name. It appears, on the contrary, to be common on the banks of the 
Mississippi above the river of the Arkansas, and on the Missouri and its 
tributary streams. It is doubtless the Poplar designated by the name of 
Cotto'n Wood, and mentioned so frequently by Gass, who accompanied 
Lewis and Clark to the Western Ocean, and by Pike in his interesting 
account of the northern part of New Spain. Often, say these travellers, 
it is the only tree seen growing on the sides of the rivers. The Mandans, 
who live 1500 miles from the mouth of the Missouri, feed their horses dur- 
ing the winter with its young shoots. The excessive cold experienced in 
these regions sufficiently proves that the Cotton Wood is not the same tree 
with the Carolinian Poplar, whose annual shoots freeze every year with a 
degree of cold much less intense. The Americans of Upper Louisiana, it 
is true, confound the two species because they are found growing in com- 
pany on the banks of the Mississippi ; but the Carolinian Poplar, which is 
more abundant than the other in Lower Louisiana, where the temperature 
of the winter is too mild for snow, disappears on the Missouri at the dis- 
tance of 100 miles from its junction with the Mississippi. 
PLATE XCV. 
Leaves of the natural size taken from a large tree. Fig. 1 , Part of a branch 
of two years' growth. 
[The Canadian Poplar is propagated by cuttings of the young wood, 
about 18 inches long, put in during autumn; the shoots produced from 
these cuttings are always curved at the lower extremity, though in a few 
years this curvature entirely disappears. The fine Poplar avenues in the 
lower parts of the gardens at Versailles are formed of this species. 
See Nuttall’s Supplement, vol. 1, p. 54.] 
AMERICAN BLACK POPLAR. 
Populus hudsonica. P. ramulis junioribus pilosis ; foliis dentatis, conspicuè 
acuminatis. 
I have found the American Black Poplar only on the banks of the river 
