3 i2 CLASSIFIED LIST OF DISEASES 



4. Young plants in their lower parts are enveloped in the brown 

 sporophores of a fungus : Thelephora ladniata, 35. 



5. The leaves become suddenly brown in summer : " Frost-blight," 

 in. 



6. The leaves show golden yellow vesicles : Cohosporium Senedonis, 

 C. Euphrasies, C. Tussilaginis, 172. 



7. The young shoots in the end of May show golden yellow spots 

 on the cortex. These afterwards rupture, and the shoots either die or 

 become contorted : Melampsora Tremulce, 164. 



8. The cortex shows golden yellow vesicles filled with spores : 

 Peridermium Pint, 172 ; Cronartium asdepiadeum, 175. 



9. The cortex gradually dies, and shows resinous exudation : 

 ibid. 



10. The cortex dies, and shows large white sheets of mycelium on its 

 inner surface : Agaricus melleus, 207. 



11. Branch-wounds bear brown bracket-like sporophores: Trametes 

 Pint, 191. 



1 2. Wounds bear large reddish brown cushion-like sporophores : 

 Polyporus Schweinitzii, 198. 



13. The cortex close to the ground bears cap-like yellow sporophores : 

 Agaricus melleus, 207. 



14. The cortex close to the ground bears white cushion-like sporo- 

 phores : Trametes radidperda, 186. 



15. The cortex or wood close to the ground bears white porous 

 crust-like sporophores : Polyporus vaporarius, 198. 



1 6. The roots are dead, and bear yellowish white cushion-like sporo- 

 phores : Trametes radidperda, 186. 



17. The roots are dead, and show resinous exudation. Between the 

 wood and cortex white mycelial sheets and black mycelial strands are 

 found: Agaricus melleus, 207. 



1 8. The roots are dead, and show white floccose mycelial strands : 

 Polyporus vaporarius, 198. 



19. The roots show mycelial growths : Elaphomyces, 71. 



20. The leading shoot or the branches die above a black mark from 

 which resin flows: Cronartium asdepiadeum, 175 ; Peridermium Pini, 

 172. 



21. The wood shows white-rot, with numerous small round or oval 

 holes: Trametes Pini, 191. 



22. The wood shows red-rot, without much smell. Floccose mycelial 

 growths and strands are found : Polyporus vaporarius, 198. 



23. The wood shows red-rot, and emits a very strong smell of turpen- 

 tine. Thin white mycelial incrustations are found in the cracks : 

 Polyporus Schweinitzii, 198. 



