21 



A few foreign trees have proven their worth in this country in rela- 

 tion to hardiness and rate of growth. Of these the most important are : 

 Norway Spruce, Scotch Pine, and European Larch. 



From results shown in several plantations in Ontario, the European 

 hardwoods will probably have a small place in future planting- work in 

 this country. 



One of our best guides in replanting will be found in the original na- 

 tural distribution of trees. Through many generations certain species 

 have become adapted to certain areas having certain conditions. Such 

 distribution may be spoken of as geographical, and local. Geographical 

 distribution depends on climatic factors, as temperature, amount of rain- 



Fig. 10— Black walnut plantation lacking soil protection. 



fall and atmospheric moisture. Local distribution depends on local vari- 

 ations, as quality of soil, drainage, exposure, etc. 



The following is the geographical distribution of native trees in 

 Ontario, and the foreign trees are placed where present experience shows 

 them to belong. This classification is arbitrary in regard to the dividing 

 lines, that is, scattered trees may extend beyond the boundaries given. 

 Species are classed with regard to their northerly limit and those found 

 in the northern area may of course be common in the southern area. In 

 each of these divisions the species find their northern limit. 



