BIRDS OF JACKSON CO., OREGON, & SURROUNDING AREAS 



Fig. 5. Mixed Conifer Forest north of Union Creek at 1,219 m. 



Franklin and Dyrness (1973) differentiated this community into 

 two zones. The western Siskiyou Mountains are considered to be in 

 the Mixed-Evergreen (Pseudotsuga-SclerophyW) Zone. The most 

 dominant tree species are Pseudotsuga menziesii and Lithocarpus 

 densiflorus. The west slope of the Cascades and the eastern Siskiyou 

 Mountains are considered in their Mixed-Conifer (Pinus-Pseudotsuga- 

 Lihocedrus-Abies) Zone, which includes as dominant trees Pseudotsuga 



