TREES OF AMERICA. 163 



The bark is green and smooth, and the leaves 

 are about two inches wide, heart-shaped, and 

 terminating in a sharp point ; the stems on 

 which they grow are long and slender, 

 and so very flexible that the leaves dance 

 about with the slightest breath of wind, and 

 are never still for a moment. The other 

 kind is called the large aspen : it grows in 

 the same sections of country with the first 

 kind, but it is not common. It is about forty 

 feet high and ten or twelve inches thick. The 

 trunk is quite straight, and covered with a 

 smooth green bark. The leaves, like those of 

 the smaller kind, are covered with thick white 

 down in the spring, which goes oft' as the sum 

 mer advances. They are almost round, two or 

 three inches wide, and bordered with large 

 teeth. 



" All the poplars have their seeds gro wing- 

 in bunches, two or three inches long, and as 

 big round as a quill, hanging from the ends 

 of the branches. You have seen them, I dare 

 say, in the summer." 



" Yes, sir : they lie about under the trees, 

 and look very much like some sorts of cater- 

 pillars." 



" 1 suppose you have not been much in- 



