Figure 2. --Dead subalpine fir 

 in Sawtooth National Forest. 

 The death of such a tree, 

 bearing more than 100 rust 

 brooms but showing no other 

 apparent symptoms, suggests 

 that broom rust infection can 

 kill directly. 



Figure 3 .-- Subalpine fir, 

 Sawtooth National For- 

 est. Trees dead above 

 rust trunk infections are 

 common. 



