Bulletin No. 21. r.V.l'.-u. 



U. S. DEPARTMENT OE AGRICULTURE. 



DIVISION OF VEGETABLE PHYSIOLOGY AND PATHOLOGY. 



B. T. GALLOWAY, Chief. 



TWO DISEASES OF RED CEDAR, CAUSED BY 



POLYFORUS JUNIPERINUS N. Sp. AND 



POLYPORUS CARNEUS Nees. 



A PRELIMINARY REPORT. 



BY 



HERMANN VON SCHRENK, 



Instructor in Botany, Henry Shazv School of Botatiy, 

 Special Agent, Division of Vegetable Physiology and Pathology. 



WASHINGTON: 



GOVERNMENT PRINTING OFFICp:. 

 1900. 



