MYCOLOGIA 



Vol. IV May, 1912 No. 3 



PRELIMINARY NOTES ON THREE ROTS 

 OF JUNIPER! 



G. G. Hedgcock and W. H. Long 

 (With Plates 64 and 65, Containing 15 Figures) 



On account of the increasing scarcity of the common red cedar 

 (Juniperus virginiana) , other species of juniper w^hich have here- 

 tofore been considered v^orthless or of very Httle economic value are 

 becoming commercially important. Any disease, therefore, which 

 seriously injures any species of juniper that reaches a size large 

 enough to be used even for fence posts, is of sufficient importance 

 to demand attention. 



In addition to the three rots caused by the species of Fomes 

 v^hich are discussed in this paper, there are also other rots of 

 juniper which do much damage, but lack of sufficient data and 

 material at this time on these diseases have made it necessary for 

 the writers to limit this article to three heart rots of living juni- 

 pers, namely: white rot, caused by Fomes juniperinus; yellow 

 rot, caused by F. earlei; and stringy brown rot, caused by F. 

 t ex anus. 



The distribution and characteristics of the white rot, and the 

 damage done by it to the red cedar have been previously noted 

 by von Schrenk (Two Diseases of Red Cedar, Caused by Poly- 

 porus Juniperinus n. sp., and Polyporus Carneus Nees, Bull. 21, 

 U. S. Dept. Agr. Veg. Phys. and Path.). The characteristics and 

 effects of the other two rots are here reported for the first time ; 



^ Published by permission of the Secretary of Agriculture. 



[Mycologia for March, 1912 (4: 45-107), was issued March 6, 1912.] 



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