60 CRANBERRY DISEASES. 



Plate V. — Fig. 1. — ^[tlKtcvoncnni poiiioriDii. A sinsjle pycni<linm from a pure 

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

 Plagiorhahdus oxycoccl. Vertical section of a pycnidium on a cranberry 

 leaf. Fig. 3. — Plaiiiorhahdiis oxycocci, sporo'phores and spores; a, three 

 spores \Yith basal appendages consisting of the greater part of the abstricted 

 sporophore. Fig. 4. — Hehtiinfliuxporiiiui iinu<jii(ilifi, showing fertile hyph;e 

 and the varied arrangement of the conidia. Figs. 5, 6, and 7. — Helmintho- 

 sporiutu inaeqiialis. Conidia showing variation in size, shape, and septa- 

 tion. Fig. 8. — Heliii'nifhospuriiini inaequaJifi. A strand of the mycelium. 

 Fig. 9. — Helnihithosjjoriiini iiiactjualis. Erect, branched, black, subcarbona- 

 ceous bodies produced in old cultures. Fig. 10. — PhyUoHiicUi putrefaciens, 

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

 tions in size and shape. Fig. 11. — Ceiithospora {?) hinata on a cranberry 

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

 spora (f) hinata. Sporogenous hyphtie and sporophores as seen when 

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

 13. — LeptothyriiDti j)oini {:'). 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. — Leptothyriam ponii (f). An older condition. Fig. 

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

 the structure of the interior. Xo signs of spore production. Fig. 1<5, a, h, 

 c, — Leptotliyrium ponii {?). Spores found associated with Leptotliyriiiin 

 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. — .s'poro- 

 nema oxycocci. Four pycnidia on a cranberry leaf. Fig. 18. — Sporoiicma 

 oxycocci. Vertical section from a cranberry leaf. Fig. IQ.^Sporoiieina 

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

 nenia oxycocci. A single spore. Fig. 21. — Rhahdospora 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. — RliaMospora oxycocci. Branched sporo- 

 phores with young spores. Fig. 24:.— Rhahdospora oxycocci. Another view 

 of l)ranched sporophores and young spores ; cr, two spores, showing pseudo- 

 septa. Fig. 25. — Sporonema piilriiiatunt. Two pycnidia on a cranberry leaf. 

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

 27. — Sporonema pulvinatum. Sporophores and young spores. Fig. 28. — 

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

 Fig. 20. — Leptothyrium oxycocci. Four pycnidia on cranberry leaf, showing 

 irregular shapes. The one in the foreground has broken away a))out 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. — 

 Leptothitrium 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. — Ci'anberry Exobasidii. A and B. — Exolmsidium vaccinii. C and 

 D. — Exobasidium oxycocci. 



110 



