122 Canadian Forestry Journal. 



erous, is the Large Toothed Poplar, Pupnlns grandidetitata, 

 Michaux. Tliis name suggests the most marked characteristic 

 which distinguishes it from the aspen, namely the widely-spread 

 teeth with which the edges of the leaves are prominently serrate. 

 The bark is not as light in color, and the wood is light, soft and 

 closu-grained, hut not strong. It is not considered as vauable a 

 species as the first described, but is used for largely the same 

 purposes. 



In the Cottonwood {Populus deltoidea, Marshall; Populus 

 monilifcra, Aiton) the leaves resemble somewhat those already 

 described. They are deltoid or broadly ovate, and the edges are 

 coarsely crenate or bluntly tooth'ed, being in this respect between 

 the leaves of the aspen and the large-toothed poplars. The base 

 is broad and usually truncate or straight, though sometimes heart 

 shaped. The aments or catkins of the pistillate or fertile flower 

 often reach a foot in length and their resemblance to a necklace 

 has given occasion for the specific name, monilifera or necklace- 

 bearing. This tree ranges from Quebec to the base of the 

 Rocky Mountains, but it is on the western plains that it has been 

 found most valuable. It was the chief dependence of the early 

 settlers of the Western States, and is being found useful also in 

 Western Canada. It has been distributed largely by the Fores- 

 try Branch of the Department of the Interior to farmers for set- 

 ting out in shelter belts and woodlots. Good success has been 

 had with it except in south-eastern Manitoba, where it has been 

 found subject to rust. Growing naturally, it attains the best 

 d^Telopmient in the river bottoms a^nd moists rather heavy soil 

 is its favourite location. It is sometimes killed back by the frost, 

 but this is probably the result of immature growth on account 

 of wet seasons in the fall. 



The Cottonwood grows to one hundred feet in height and 

 sometimes seven or eight in diameter. With its height and 

 spreading head it makes a splendid shelter, and, as it grows 

 rapidly, is soon sufficiently developed to make its eflfect felt. The 

 wood is light, but it is useful for fuel and general purposes. 

 The heartwood is dark brown and the sapwood nearly white. 



Leaving the other native poplars for future consideration, 



