APPENDIX E 329 



* Luzula confusa Lindeb. Last woods, east shore, Artillery 

 Lake, August 6. 



Pinus divaricata (Ait.). Du M. de C. 



The Banksian pine is generally distributed in suitable places 

 throughout the region north to Great Slave Lake. We observed 

 it on Pike's Portage, a few miles east of the eastern extremity of 

 this lake. 



A tree near Smith Landing, 4 inches in diameter at the base, 

 was 33 years old. Another near Fort Smith was 12 feet high, 

 1 inch thick at base, with 23 rings of annual growth. 



Larix laricina (Du Roi) Koch. 



Growing in swamps throughout the region nearly to the tree 

 limit. One tree, at least a foot in diameter, was seen at the 

 southern end of Artillery Lake. 



On October 14, on the Athabaska below Fort McKay, we 

 noted that the tamarack alone among the leaf shedders still bore 

 its golden leaves. 



Picea canadensis (Mill.). B. S. P. 



The white spruce is generally distributed north to the tree 

 limit. The height of one measured on an island below Fort 

 McKay was 118 feet. A log measured near the same place was 

 22 inches thick at butt, 84 feet long, and 15 inches in diameter 

 at the smaller end. 



At the tree limit the white spruces, which form the bulk of the 

 forest, attain a great age. A medium-sized one (8 feet high and 

 12 inches through at the butt), measured on the eastern shore of 

 Artillery Lake at the "Last Woods," showed about 300 annual 

 rings. 



The northernmost point where we observed it was the northern 

 shore of Aylmer Lake, near where Lockhart River enters the 

 lake. The largest tree was about 4 inches in diameter and 

 about the height of a man. 



