CEDAR DISEASES 



131 



by a ground fire. The same disease affects similarly spruce, 

 fir, juniper, arbor-vitse and hemlock. It is described under 

 spruce diseases, on page 317. 



Fig. 16. — Brown felt-blight on inceusa cedar. 



Eastern Witches'-Bkoom 



Caused by Gymnosporangium myricaium (Schw.) Fromme 



Witches'-brooms are found on white cedar along the At- 

 lantic Coast from Massachusetts to Delaware and in northern 

 Florida and southern Alabama. The witches'-broom and 

 branch-swelling diseases, both caused by similar rust-fungi, 



