3 o6 CLASSIFIED LIST OF DISEASES 



11. The cortex dies right round the branch or stem, and bears 

 black tubercles : Phoma abietina, 138. 



12. The stem bears irregular or bracket-shaped sporophores which 

 show very fine pores : Polyporus Hartigii, 194. 



13. The stem bears sporophores with large pores: Irametes Pint, 

 191. 



14. The stem bears tawny yellow cap-shaped sporophores, which 

 spring from rhizomorphs : Agaricus melleus, 207. 



15. The roots bear white sporophores : Trametes radiciperda, 186. 



1 6. The roots are attacked by rhizomorphs : Agaricus melleus, 207. 



Acer 



1. The seedlings show black blotches on the leaves or stem, and 

 may decay : Cercospora acerina^ 135 ; Phytophthora omnivora^ 58. 



2. The leaves show white blotches : Erysiphe bicornis, 70 ; E. 

 Tulasnei, 70. 



3. The leaves show black blotches : Rhytisma acerinum, 105. 



4. In autumn the leaves show persistent green blotches, which 

 ultimately bear black spots : R. punctatum, 106. 



5. The branches wither, while a transverse section of the wood 

 shows dark greeri blotches : Nectria cinnabarina, 96. 



6. The branch or stem dies, while the cortex bears cinnabar-coloured 

 fungus bodies : N. cinnabarina, 96. 



7. The stems of young plants contract suddenly above the roots : 

 Pestalozzia Hartigii? 136. 



8. The branches show canker-spots : Frost-canker, 293. 



9. The branches bear mistletoe : Viscum, 25. 



Acer platanoides 



The branches die in spring, and show oblong fungus-bodies : 

 ,Septoglceutn Hartigianum, 141. 



.ZEsculus 



The branches die, and bear cinnabar-coloured fungus-bodies on the 

 cortex : Nectria cinnabarina, 96. 



Alnus 



1. The leaves show yellow vesicular swellings : Exoascus flavus, 133. 



2. The leaves show greyish white downy corrugations : E. epiphyllus, 



133- 



3. The cones show pocket-like outgrowths : E. alnitorquus, 133. 



4. The branches show canker-spots : Nectria ditissima, 91. 



5. The wood shows red-rot : Polyporus sulphur eus, 200. 



6. The roots show fleshy outgrowths : Schinzia Alni^ 39. 



