34 Forestry Quarterly 



The birch as referred to above is composed of two species, the 

 Paper birch {Betula papyrifera), and the White birch {Betula 

 alaskana). Twenty-five per cent of the area of the Slopes type 

 was burned. 



The Sand Ridge Type — The only association which occurs 

 upon this type is the pure Jack pine (Piniis hanksiana). In 

 the western portion of the region the Lodgepole pine appears 

 in mixture with it. 



Swamp Muskeg Type — The swamps and muskegs occupy 

 shallow landlocked depressions in the drift and also cover large 

 areas of the poorly drained lacustrine clays. A stunted growth 

 of Black spruce and larch occurs on these in the proportions of 

 65 and 35 respectively. 



