80 



FOREST DISTRIBUTION 



southward to include the southern arm of Lake Pend d 'Oreille. 

 It includes some of the most mesophytic conditions of the region. 

 A survey of the forest of this section gives the following data: 



The forests of this section vary from open stands of yellow 

 pine and Douglas spruce in some localities, or in others of typ- 

 ical forests of lodgepole, to the heavy forests of ^^•hite pine, 

 hemlock and grand fir, such as may be found along the bot- 

 toms of Priest River. In this stand is a copious undergrowth of 

 young hemlock and arborvitae, but in many places the forest 

 is too dense to support more than a light undergrowth of broad- 

 leaved shrubs. 



The second section, here designated as the Coeur d'Alene, 

 lies southeast of the first. It extends for about 130 miles in 

 length and from 50 to 75 in breadth. It lies about equally in 

 Montana and Idaho, across the Coeur d'Alene Range. It includes 

 on the western side the drainage of the Coeur d'Alene and St. 

 Joe rivers in Idaho, and on the Montana side the lower valley 

 of the Clark's Fork and reaching to the summits of the Cabinet 

 Mountains and Evaro Pass. Its southeastern corner lies near 

 Missoula at the junction of the Bitter Root and the Clark's Fork 

 rivers. This area, as discussed above, is notable for the richness 

 of its flora. It includes the only stations thus far reported for 

 Tsuga Mertciisiana in this region, and in shrubby and herbaceous 



