EXPLANATION OF PLATE I. 
CoRYNEUM PUSTULATUM Peck. 
Page 26. 
. Piece of a branch bearing the fungus in pustules. 
. One immature and three mature spores in position x 400. 
. Two free spores x 400. 
Fria. 
Fia. 
Fie. 
WwW wre 
ASTEROSPORIUM BETULINUM Peck. 
Page 26. 
Fia. 4. Piece of a branch bearing the fungus in pustules. 
Fra. 5. One immature and two mature spores x 400. 
SYNPHRAGMIDIUM EFFUSUM Peck. 
Page 27. ; 
Fie. 6. A piece of wood bearing a patch of the fungus. 
Fre. 7. Mycelium with two rudimentary spores x 400. 
Fig. 8. A spore with the series of cells adhering to each other x 400. 
Fra. 9. A spore with the series of cells separating from each other x 400. 
Fre. 10. A single separated series of cells separating from each other x 400. 
TORULA UNIFORMIS Peck. 
Page 27. 
Fre. 11. A piece of bark bearing tufts of the fungus. 
Fie. 12. Two clusters of flocci x 400. 
Fraq. 13. Two flocci united at the base x 400. 
MIcROSTROMA LEUCOSPORUM WViessi. 
; Page 30. 
Fig. 14. Part of a leaflet bearing small patches of the fungus. 
Fic. 15. Vertical view of a spore mass x 400. 
Fre. 17. Lateral view of a spore mass x 400. 
Fra. 17. Five spores x 400. 
CANTHARELLUS BREVIPES Peck. 
Page 
Fra. 18. A smal] plant. 
Fra. 19. Vertical section of a pileus. 
Fia. 20. Four spores x 400. 
CERCOSPORA ELONGATA Peck. 
Page 29. 
Fia. 21. Part of a leaf bearing the fungus in augular spots. : 
Fra, 22. A tuft of flocci x 400. 
Fra. 28. Five spores x 400. 
