A STUDY OF HKAET-ROT TN WESTERN HEMLOCK. 



possessing therapeutic properties of some value. Tannin has been 

 found in considerable quantities in the fungus. 



From specimens preserved in the Laboratory of Forest Pathology 

 at Missoula, Mont., the host range of Ecliinodontium tinctorium 

 is as follows: Tsuga Tieterophylla, T. mertensiana, Abies (jrandis, 

 A. concolor,A. lasiocarpa, 

 A, nohilis, A. magnljica, 

 and A. amabilis. The 

 fungus has not been re- 

 ported on A. venusta. 

 Its occurrence on A. 

 arizonica is reported by 

 Hedgcock.^ In the very 

 rarest of cases E. tinc- 

 torium occurs on Picea 

 engelmanni and Pseudo- 

 tsugataxifolia. The fun- 

 gus rarely occurs on any 

 but its conunon hosts 

 and is only of economic 

 importance in the con- 

 sideration of problems 

 relating to the genera 

 Abies and Tsuga. The 

 specimens which reached 

 Berlin from Japan grew 

 on Tsuga diversifolia. 



GEOqRAPHIC DISTRIBUTION. 



In view of the fact that 

 many of the more senious 

 wood-destroying fungi 

 are distributed over the 

 world, it is interesting to 

 note that the geographic 

 range of Ecliinodontium tinctorium is limited. Except the speci- 

 mens from Japan, it has not been found outside of western North 

 America. To judge by specimens on hand in the Laboratory of 

 the Office of Investigations in Forest Pathology of the Bureau of 

 Plant Industry and as reported by others, the range of this fimgus 

 in North America extends from Alaska to northern Mexico and as 

 far eastward as the limits of the range of grand fir and hemlock on the 

 western slopes of the Continental Divide in Canada and Montana. 



Fig. 2. — Ecliinodontium tinctorium growing out of a blaze, 

 which was the source of infection. Note the spines on the 



fungus. 



1 Hedgcock, G. G. Notes on some diseases of trees in our National Forests. 

 V. 2, no. 2, p.78. 1912. 



In Phytopathology, 



