EXPLANATION OF PLATE I. 



CORYNEUM PUSTULATUM Peck. 

 Page 26. 

 Fig. 1. Piece of a branch bearing the fungus in pustules. 

 Fig. 2. One immature and three mature spores in position x 400. 

 Fig. 3. Two free spores x 400. 



ASTEROSPORIUM BETULINUM Peck. 

 Page 26. 

 Fig. 4. Piece of a branch bearing the fungus in pustules. 

 Fig. 5. One immature and two mature spores x 400. 



Synphragmidium efftjsum Peck. 

 Page 27. 

 Fig. (5. A piece of wood bearing a patch of the fungus. 

 Fig. 7. Mycelium with two rudimentary spores x 400. 

 Fig. 8. A spore with the series of cells adhering to each other x 400. 

 Fig. 9. A spore with the series of cells separating from each other x 400. 

 Fig. 10. A single separated series of cells separating from each other x 400. 



TORULA TJNIFORMIS- Peck. 

 Page 27. 

 Fig. 11. A piece of bark bearing tufts of the fungus. 

 Fig. 12. Two clusters of flocci x 400. 

 Fig. 13. Two flocci united at the base x 400. 



MlCROSTROMA LEUCOSPORUM Niessl. 

 Page 30. 

 Fig. 14. Part of a leaflet bearing small patches of the fungus. 

 Fig. 15. Vertical view of a spore mass x 400. 

 Fig. 17. Lateral view of a spore mass x 400. 

 Fig. 17. Five spores x 400. 



Cantharellus brevipes Peck. 

 Page 

 Fig. 18. A small plant. 

 Fig. 19. Vertical section of a pileus. 

 Fig. 20. Four spores x 400. 



Cercospora elongata Peck. 

 Page 29. 

 Fig. 21. Part of a leaf bearing the fungus in augular spots. 

 Fig. 22. A tuft of flocci x 400. 

 Fig. 23. Five spores x 400. 



