3 io CLASSIFIED LIST OF DISEASES 



Ledum 



The leaves are marked by brown blotches, and show small yellow 

 fungus-bodies: Chrysomyxa Ledi. 179. 



Medicago, see Trifolium 



Picea 



1. The seedlings droop soon after appearing : Phytophthora omnivora, 

 58 ; Nectria cucurbitula, 89. 



2. Plants in the nursery become yellow and die, the stem being con- 

 tracted close above the surface of the ground : Pestalozzia Hartigii, 136. 



3. Young plants, or the branches of older trees, are enveloped in 

 dark brown mycelia : Herpotrichia nigra, 76. 



4. Young plants are enveloped in the sporophore of a fungus : 

 Thelephora laciniata, 35. 



5. Young and old trees die, their roots showing mycelia : Rhizina 

 undulata^ 123. 



6. The leaves and branches wither in winter and spring : Frost, 

 291. 



7. The leaves bear golden yellow vesicles : Chrysomyxa Rhododendri, 

 177; C. Ledi, 179.' 



8. The leaves become yellow, and show golden yellow longitudinal 

 ridges on their under surface : Chrysomyxa Abietis, 175 



9. All the leaves of a young shoot are abnormally short, and rupture 

 on their four sides : SEcidium coruscans, 183. 



10. The leaves become red, and later yellowish brown. They either 

 show longitudinal black ridges, or fall prematurely : Hysterium macro- 

 sporum, 109. 



11. The branches die in May or June : Septoria parasitica, 143. 



12. The scales of the cones show numerous round brown swellings 

 on their upper surface : Radium strobilinum, 182. 



13. The scales of the cone show two large secidia on their lower 

 surface : sEtidium conorum Picece, 183. 



14. The cortex shows dead patches beset with groups of red fungus- 

 bodies : Nectria Cucurbitula, 89. 



15. The cortex in the lower part of the stem shows resinous exuda- 

 tion : Trametes radiciperda, 186. 



1 6. The cortex shows white mycelial sheets on its inner surface : 

 Agaricus me Ileus, 207. 



17. The cortex shows evidences of injury by sun : Bark- scorching, 

 294. 



1 8. The root is dead, and bears small yellowish white fungus-bodies, 

 or large white sporophores : Trametes raditiperda, 186. 



