182 NOTES ON FOREST TREES. 



tire whitish on the under side, the leaves as well as the 

 buds giving off the peculiar fragrance of this tree. 



Populus heterophylla (Downy Poplar) is very com- 

 mon near Point of Rush, and on Block Island, Lake 

 Champlain ; it is a small tree 18 or 20 inches in diameter, 

 40 feet high. 



Populus moniltfera ( Cotton-wood) grows near Keese- 

 ville, Port Henry and Peru, and there is one in a piece of 

 woods near Peru village 15 feet in circumference and 80 

 feet high. One that was cut and left lying on the ground 

 measured 70 feet in length and 3 feet in diameter without 

 the bark. This tree or log had 184 annual circles of 

 growth : to estimate within bounds the larger tree which 

 was left standing must be three hundred years old. 



Populus angulata {Angled Cotton-wood) is very com- 

 mon on the Vermont shore of the lake, but strange to 

 say, it was not found on the New York shore though 

 many places were visited. 



Populus dilatata (Lombardy Poplar) is very abun- 

 dant : it is a beautiful tree, exceeding in height the tallest 

 trees near it. It is entirely free from the attack of 

 Borers. The lower limbs are often 20 feet in length, 

 giving" the tree the form of a spruce. It is an introduced 

 tree, as it is in Massachusetts, and is found growing along 

 fence rows. 



Populus grandidentata (Large-toothed Aspen) is very 

 common, tall and straight. It is here considered one of 

 the most valuable timber trees and for this reason it was 

 difficult to obtain a good specimen. It is used for frames 

 of buildings and is considered indispensable for floor tim- 

 bers. Several stables and sheds were seen, the floors of 

 which had been in use sixty to seventy years, and they 

 were perfectly sound. 



In one building there was a poplar timber very sound, 



