CLASSIFIED LIST OF DISEASES 307 



Alnus glutinosa 



The leaves show vesicular corrugations : E. alnitorquus, 133. 



Alnus incana 



The branches bear witches' brooms : E. borealis, 133. 



Alnus viridis 



The branches wither, and black tubercles appear on the dead 

 cortex : Valsa oxystoma, 151. 



Berberis 



The leaves show golden yellow blotches : Puccinia graminis, 155. 



Be tula 



1. The leaves show small yellow fungus-bodies : Melampsora 

 betulina, 171. 



2. The leaves show vesicular swellings : Exoascus carnea, E. Betulce, 



J 35- 



3. The branches bear witches' brooms : Exoascus turgidus, 133. 



4. The stem bears large bracket-shaped sporophores : Polyporus 

 betulinus, 206. 



5. The stem bears brown crust-like sporophores : Polyporuslavigatus, 

 206. 



Brassica 



The roots bear fleshy outgrowths : Plasmodiophora Brassicce, 39. 



Carpinus 



1. The leaves bear small golden yellow fungus-bodies : Melampsora 

 Carpini, 171. 



2. The branches bear witches' brooms : Exoascus Carpini, 135. 



3. Branches or stem show canker-spots : Nectria ditissima, 91 ; 

 Frost-canker, 293. 



Castanea 



The branches show prominent swellings, and bear a " mistletoe " : 

 Loranthus, 30. 



Corylus 



1. The leaves show small brown blotches : Sphcerella, 88. 



2. The leaves show white dusty blotches : Erysiphe guttata, 70. 



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



Crataegus 



1. The leaves bear golden yellow swellings, which produce aecidia : 

 Gymnosporangium clavariaforme, 158. 



2. The leaves show white dusty blotches : Erysiphe guttata^ 70. 



3. The branches bear witches' brooms : Exoascus bullatus, 133. 



X 2 



