1 1. 1. 1' S T R A T ! N S 



PLATES. 



Page. 

 Plate I. A living aspen tree with several spirophores of Fames igniarius. Frontispiece. 

 II. Fig. 1 — Cross section of the trunk of a living silver maple rotted by 

 Forms igniarius. Fig. 2. — Cross section of a living aspen tree rotted 

 by Fames ign iarius 76 



III. Fig. 1. — Cross section of a living beech Tree diseased by Fomes igni- 



arius. Fig. 2.— cross section of a living red oak tree rotted by Fames 



lartii 76 



IV. Fig. 1.— Fruiting body of Polyparus sulphur eus. Fie. 2.— Cross 



section of a living post oak tree rotted by Polyporus sulphureus 76 



V. Fig. 1. — Piped-rot of oak. Fig. 2. — Piped-rot of chestnut 76 



VI. Fig. 1. — Cross section of a paper birch tree rotted by Forms nigricans. 

 Fig. 2. — An abortive fruiting body of Fames nigricans upon a living 



tree of paper birch 76 



VII. Fig. 1.— Cross section of a living white oak tree decayed by Hydnum 

 crinacrus. Fig. 2. — Fruiting body of Hydnum erinaceus in a hollow 



log - ' * 76 



VIII. Fig. 1. — A dead beech tree with sporophores of Fames famentarius. 

 Fig. 2.—' -- section of a dead beech tree rotted by Fames 



fomentarius 76 



IX. Fig. 1. — A dead yellow birch tree with fruiting body of Polyporus 

 betulinus. Fig. 2. — Cross section of yellow birch tree rotted by 



Polyporus betulinus 76 



X. Fig. 1. — An oak railroad tie rotted by Daedalea quercina. Fig. 2. — 

 Cross section of the tie shown in figure 1. two feet from the fruiting 

 body 76 



TEXT FIGURES. 



Fig. 1. Oak trees with mistletoe on the branches 15 



2. A black spruce tree with a large witches' broom caused by dwarf 



mistletoe 16 



3. Spanish moss on a large oak tree 17 



4. An aspen tree with many dead lateral branches 32 



5. A living black oak tree with a sporophore of Polyporus obtusus growing 



out of the opening of an insect burrow 41 



6. An oak railroad tie with fruiting bodies < »f Polystictus versicolor 54 



7. A living tree of red oak the bark of which was killed by fire 57 



8. A dead stub of a maple tree bearing fruiting bodies of the sap-rot fungus 



I Fames applanatus) 59 



9 . A piece of oak timber rotted by Stereum Jrustulosum 60 



10. Diagram showing relative rate of decay of 2.40i) pieces of ••hill*' and 



"bottom"' red oak 63 



11. Cross section of an oak railroad tie rotted by one of the sap-rot fungi... 64 



149 7 



