260 



Origin of Biomes and Succession 



\a^ 



120 



Dominant trees 



1. Abies magnifica 



2. Pinus monticola 



3. Pinus contorta 



4. Abies concolor 



5. Tsuga meitensiana 



no 



TDD 



M 



Subdominant herbs of 

 the forest floor 



6. Sarcodes sanguinea 



7. Pirola dentata integra 



8. Pirola picta 



9. Pterospora andiomedea 



10. Coralorrhiza maculata 



11. Chimaphila umbellata 



12. Pirola seeunda 



•"-y^ V^ / / 



■ift 



Fig. 114. Diagram of the distribution of the fi\e dominant trees and se\en 

 subdominant herbs of the Sierra Nevadan fir forest, indicated by the small 

 hatched area. (Compiled from Munns and Costing and Billings.) 



i 



