'-■ I? ft- 



■mm 





v&. 



Fig. 51. — Piece of larch wood rotted by Folijponis Schu-elnitzii, showing crevices 



and patches of white mycelium. 



^ 



Fig. 52.— Section at base of Scots pine stem with rot caused by 

 Pohjporus Schwein ifzii. 



