. [Bulletins on forest pathology : from Bulletin , Washington, , 1913-1925]. Trees; Plant diseases. 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 Ecliinodontium tinctorium is as follows: Tsuga heteropliylla, T. mertensiana, Abies grandis, A. concolor,A. lasiocarpa, A. nobilis, A. magnified, and A. amabilis. The fungus has not been re- ported on A. venusta Its occurrence on
. [Bulletins on forest pathology : from Bulletin , Washington, , 1913-1925]. Trees; Plant diseases. 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 Ecliinodontium tinctorium is as follows: Tsuga heteropliylla, T. mertensiana, Abies grandis, A. concolor,A. lasiocarpa, A. nobilis, A. magnified, and A. amabilis. The fungus has not been re- ported on A. venusta Its occurrence on A. arizonica is reported by In the very rarest of cases E. tinc- torium occurs on Picea engelmanni and Pseudo- tsuga taxifolia. 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 Tsuga diversifolia. 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 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 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 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. In Phytopathology, v. 2, no. 2, Please note that these images are extracted from scanned page images that may h
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