bill. 26, Oiv. wej. Phys. & Path., U. S. Dept. of Agriculti 



Plate vi. 



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Fig. 1. Red Spruce: Early stage of the decay caused by Trametes pini forma abietis 







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Fig 2. Red Spruce: Advanced stage of the decay caused by 

 Trametes pini forma abietis. 



