60 CRANBERRY DISEASES. 



PLATE V. Fig. 1. 8phaeronema ponioruin. A single pycnidium from a pure 

 culture ; a, three spores, showing variations in size and shape. Fig. 2. 

 Plagiorhabdus oxy cocci. Vertical section of a pycnidium on a cranberry 

 leaf. Fig. 3. Plagiorhabdus oxycocci, sporophores and spores; a, three 

 spores with basal appendages consisting of the greater part of the abstricted 

 sporophore. Fig. 4. Helminthosporium inaequalis, showing fertile hypliu* 

 and the varied arrangement of the conidia. Figs. 5, 6, and 1. Hclmintho- 

 sporium inaequalis. Conidia showing variation in size, shape, and septa- 

 tion. Fig. 8. Helminthosporium inaequalis. A strand of the mycelium. 

 Fig. 9. Helminthosporium inaequalis. Erect, branched, black, subcarbona- 

 ceous bodies produced in old cultures. Fig. 10. Phyllosticta putrefaciens, 

 from a culture. Pycnidia ; a, four spores from the pycnidia, showing varia- 

 tions in size and shape. Fig. 11. Ceuthospora (?) lunata on a cranberry 

 leaf, showing a vertical median section of a pycnidium. Fig. 12. Ceutho- 

 spora (?) lunata. Sporogenous hyphse and sporophores as seen when 

 crushed out ; a, three spores showing variations in size and shape. Fig. 

 13. Leptothyrium pomi (?). An early stage in the formation of the 

 " speck." The remains of a spore from which it seemed to have arisen are 

 still present. Fig. 14. Leptothyrium pomi (?). An older condition. Fig. 

 15. Leptothyrium pomi (?). A vertical section from a cranberry, showing 

 the structure of the interior. No signs of spore production. Fig. 16, n, I), 

 c.. Leptothyrium pomi (?). Spores found associated with Leptothyrium 

 pomi on the surface of the fruit ; a, a germinating spore of an unknown 

 fungus from which some specks at least appeared to arise. Fig. 17. Sporo- 

 nema oxycocci. Four pycnidia on a cranberry leaf. Fig. 18. Sporonema 

 oxycocci. Vertical section from a cranberry leaf. Fig. 19. Sporonema 

 oxycocci. Two sporophores with nearly mature spores. Fig. 20. Sporo- 

 nema oxycocci. A single spore. Fig. 21. Rhabdospora oxycocci. Section 

 of a pycnidium on a cranberry leaf. Fig. 22. Rhabdospora oxycocci. Sec- 

 tion of a pycnidium from a leaf, showing the inner wall separated from the 

 outer and collapsed. Fig. 23. Rhabdospora oxycocci. Branched sporo- 

 phores with young spores. Fig. 24. Rhabdospora oxycocci. Another view T 

 of branched sporophores and young spores ; a, two spores, showing pseudo- 

 septa. Fig. 25. Sporonema pulvinatum. Two pycnidia on a cranberry leaf. 

 Fig. 26. Sporonema pulvinatum. A vertical section of a pycnidium. Fig. 

 27. Sporonemq pulvinatum. Sporophores and young spores. Fig. 28. 

 Sporonema pulvinatum. Three spores showing variations in size and shape. 

 Fig. 29. Leptothyrium oxycocci. Four pycnidia on cranberry leaf, showing 

 irregular shapes. The one in the foreground has broken away about its 

 base. Fig. 30. Leptothyrium oxycocci. Section of a pycnidium, showing its 

 dimidiate character. Fig. 31. Leptothyrium oxycocci. Portion of the wall 

 of the pycnidium, showing the parallel arrangement of the cells. Fig. 32. 

 Leptothyrium oxycocci. Sporophores and spores. Fig. 33. Leptothyrium 

 oxycocci. Four spores, showing the variations in size and shape. 



PLATE VI. Cranberries destroyed by blast and scald. From a photograph. 

 (Natural size.) 



PLATE VII. Cranberry Exobasidii. A and B. Exobasidium vaccinii. C and 

 D. Exobasidium oxycocci. 



110 



