TREES AND TIMBER 



435 



CEDAR, RED 



Rust {Gymnosporangium, various species). — The "cedar 

 apples," familiar upon the red cedar, are usually of but 

 small significance to the cedar tree itself unless exception- 

 ally abundant. See apple rust. 



Fig. 190.- 



- Longitudinal section of cedar showing effect of Polyponts juniperinus. 

 After von Schrenk. 



White rot {Polyporus juniperinus v. Schrenk). — In 

 this disease long holes appear in the heartwood, extend- 

 ing longitudinally with a partition of sound wood be- 

 tween. These cavities may eventually unite to form tubes 

 throughout the tree. The wood between one cavity and 



