CLASSIFIED LIST OF DISEASES 311 



1 9. The root shows red-rot and white mycelia : Polyporus vaporarius^. 

 198. 



20. The root is dead, and shows black mycelial strands which form 

 white enlargements between the cortex and wood : Agaricus melleus, 

 207. 



21. Branch-wounds bear brown sporophores : Trametes Pini, 191; 

 Polyporus Hartigii, 1 94. 



22. Wounds bear large white sporophores : Polyporus borealis, 196. 



23. The wood shows white-rot : Polyporus Hartigii, 195. 



24. The wood shows white-rot. The pure white patches have usually 

 a black spot in the centre : Trametes radiciperda, 186. 



25. The wood shows white-rot, and contains numerous cavities : 

 Trametes Pint, 191. 



26. The wood shows white-rot, and crumbles down into very small 

 cubes : Polyporus borealis, 196. 



27. The wood shows red-rot : Polyporus vaporarius, 198. 



28. The wood shows dark brown blotches or cavities : Wound-rot, 

 2 3 6 > 243. 



29. The wood shows green-rot : Peziza ceruginosa, 224. 



Pinus Cembra 

 The roots show numerous Mycorhizae, 71. 



Pinus montana 



The branches with their leaves are enveloped and killed by dark 

 brown mycelia: Herpotrichia nigra, 77. See also the diseases, i, 6, 8, 

 10, 13, 1 6, 17, under Pinus sylvestris. 



Pinus Strobus 



1. The leaves die, and display black fungus-bodies : Hysterium 

 brachysporum, 117. 



2. The cortex shows resinous exudation and golden yellow vesicles : 

 Peridermium Sir obi, 175. See also diseases i, 4, 10, 13, 14, 16, 17, 

 under Pinus sylvestris. 



Pinus sylvestris 



1. The seedlings droop and die: Phytophthora omnivora, 58: 

 Nectria Cucurbitula, 89. 



2. Seedlings and older plants show brown blotches, which afterwards 

 bear small black tubercles : Hysterium Pinastri, no. 



3. Seedlings and older plants are entirely yellow and finally brown 

 or the discoloration spreads gradually back from the apex of the shoots 

 "Blight," in. 



