Shade Tree and Timbek DESTuuviNa Fungi. 



!^83 



evidence that the tree was diseased, and to satisfy myself that the 

 tree suffered from " heart rot," I had my guide cut out a few blocks 

 of tlie wood from the trunk. Two inches beneath the bark the 

 wood was found in a "dozed" condition. The heart was not in a 

 very advanced stage of decay though the area was very extensive. 

 The mycelium visible to the eye was very scanty. Still the wood 

 sliowed numerous fine perforations, and as some shriidvage had 

 taken place, it presented the very line divisions into minute blocks 



63. — Fruit bodies of Polyporus horealis, sliowing shaggy cap. 



described above. I then searched more carefullv for some fruit 

 form of the fungus and found at the ground level, buried under 

 leaves, a fruit body of the Polyporus horealis between two but- 

 tresses of the base of the trunk. The tree was not felled, and con- 

 sequently there was no opportunity of ascertaining the special mode 

 of infection in this case. 



POLYPOKUS StJLPHUEEUS. 



The sulphur polyporus has a very wide distribution and occurs on 

 a great variety of broad leaved trees as well as on certain of the 



