A STUDY OF HEART-ROT IN WESTERN HEMLOCK. 5 
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 Echinodontium tinctorvum 
is as follows: Tsuga heterophylla, T. mertensiana, Abies grandis, 
A. concolor, A. lasiocar pa, 
A. nobilis, A. magnifica, 
and A. amabilis. The 
fungus has not been re- 
ported on A. venusta. 
Its occurrence on A. 
arvzonica is reported by 
Hedgcock.t In the very 
rarest of cases EH. tinc- 
torium occurs on Picea 
engelmanni and Pseudo- 
tsugataxifolia. The fun- 
gus rarely occurs on any 
but its common 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 D’suga dwersifolia. 
GEOGRAPHIC DISTRIBUTION. 
In view of the fact that 
many of the more serious 
wood-destroying fungi 
are distributed over the 
world, it is interesting to 
note that the geographic 
Fig. 2.—Echinodontium tinctoriwum growing out of a_ blaze, 
which was the source of infection. Note the spines on the - 
fungus. 
range of Hchinodontium 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 fungus 
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. 
1 Hedgcock, G. G. Notes on some diseases of trees in our National Forests. In Phytopathology, 
Word 0.52; 78+ 1912. 
