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RESEARCHES ON FUNGI 



can be counted ; von Schrenk 

 and Spaulding * found fruit-bodies 

 of this same species with 50 layers 

 of tubes ; and Atkinson mentions 

 a Fomes igniarius fruit-body 

 which he found on a Birch in the 

 Adirondacks, which had 80 layers 

 of tubes. 2 Whether or not each 

 layer of tubes in a fruit-body of 

 Fomes igniarius represents the 

 whole of one year's growth re- 

 mains, however, to be determined 

 by direct observation ; but, in 

 any case, I do not doubt that 

 Fomes igniarius is much longer 

 lived than Fomes applanatus. 

 Dr. Faull has kindly shown 



/ 



me a remarkable fruit-body of 

 Fomes officinalis. 3 It was found 

 at Ravelstoke, British Columbia, 

 hanging from the inclined trunk 

 of a Pine tree (Pinus monticola) ; 

 it is cylindrical in form and has 

 a length of almost exactly 2 feet 



FIG. 45. Fomes officinalis. A large cylin- 

 drical fruit-body, 1 foot 11 '5 inches 

 long, 7-5 Ibs. in weight, gathered by 

 Ur. R. Cameron at Ravelstoke, British 

 Columbia, Canada, from a trunk of 

 Pinus monticola, now in the possession 

 of Professor J. H. Faull. It was 

 attached to the tree by its top and 

 was slightly flattened against the trunk 

 on the opposite side to that in view. 

 It has 45 annual rings of hymeiiial 

 tubes. Photographed by J. H. Faull 

 at the University of Toronto. 



1 H. von Schrenk and P. Spaulding, "Diseases -of Deciduous Forest Trees," 

 Bur. of Plant Industry, U.S. De.pt. of Agriculture, Bull. No. 149, p. 29. 



2 G. P. Atkinson, Mushrooms, Edible and Poisonous, New York, 1911, p. 194. 



'' Fomes officinalis is the original agaricum of the ancient Greeks and Romans 

 and has been of importance in medicine as a purgative from the time of Dioscorides 



