HEART-ROT CAUSED BY OTHER FUNGI 143 



Note. Since writing the above I have found a larch near 

 Oxford in which part of the crown is heart-rotted, apparently 

 by this fungus. The rot had not advanced very far and no 

 fructifications were present. The rotted portion shows 

 incipient ring-shake through the partial decomposition of 

 the junctions of the annual rings. The holes described at 

 the junctions occur chiefly in the last-formed elements of 

 the summer wood, but the first-formed spring wood of the 

 next year is in places affected. In each annual ring there 

 is also a number of radially extended delignified patches 

 and holes. The rotted portion, which occupies the centre 

 of the stem, is surrounded by a layer of insoluble gum 

 which resembles that described in connexion with Fomes 

 annosus. Photographs of the specimen are shown in figs. 

 56 and 57. 



