REFORESTATION IN NORTHERN IDAHO 



41 



hills which, prior to 1910, were covered with a more or less mixed 

 forest of coniferous trees comprising the following species: 

 Pseudotsuga mucronata, in practically all situations; Pinus pon- 

 derosa, abundant on south slopes and in exposed and rocky 

 situations; Larix occidentalis associated with Abies grandis and 

 Pseudotsuga; Pinus monticola and Thuya plicata accompanied 



Fig. 7. An old "burn" in Ferry County, Washington. Typical representation 

 of the destruction by fire of the coniferous forests of the Northwest. 



by individuals of Pseudotsuga and Abies, confined generally to 

 the canons and rich levels at the bases of north slopes. 



These mountain slopes were overrun by fire on August 21 and 

 22, 1910. Seeming to represent fairly the average forest condi- 

 tions for northern Idaho, it was decided that here if anywhere 



