SHADE TREE AND TIMBER DESTROYING FUNGI. 225 



results desired, but section the plant through the middle perpen- 



dicularly and compare the color and structure of the tube strata. 



In Polyporus applanatus the strata are deeper and very clearly 



differentiated. They are also 



of a dark gray, or hair-brown 



color, while the tube strata of 



Polyporus pinicola are whitish 



or yellowish-brown, and while 



clearly differentiated are not 



so distinctly so as in Polyporus 



applanatus. 



The fruit bodies of Poly- 

 porus pinicola are sometimes 

 found on the trunks of living 

 trees but much more fre- 

 quently they do not appear 

 until the tree is dead. They 

 are quite common on dead 

 standing trunks and stumps 

 and on fallen logs. They 

 continue to grow after 'the 

 tree is dead and in quite an 

 advanced stage of decay. 



In wood which is in quite 

 an advanced stage of decay, 

 extensive sheets of mycelium 

 forming "punk" are often 

 in the crevices formed by the 

 checking of the wood. These 

 sheets of punk are very simi- 

 lar to those formed by Poly- 

 porus sulphureus in deciduous 84. "Dozed " place in butt oj red 



f *"*' 



as well as in coniferous trees. 



In the large number of cases 



in which I have found these sheets of punk in rotten 



logs or decaying tree trunks of conifers in the Adirondack 



mountains, I have not found any fruit bodies of the Polypovus 



sulphureus. Since these sheets of punk found in conifers'are 



