26 THE DECAY OF TIES IN STORAGE 



PLATE IV 



Fig. 1. Peniophora gigantea on the end of a compara- 

 tively new sound yellow pine tie. The radiat- 

 ing white streaks are mycelium intermixed 

 with exuding resin. 



Fig. 2. Longitudinal section of pine wood beneath the 

 sporophore of Peniophora gigantea shown in 

 Plate I, Fig. 3. Note that the wood is not 

 decayed. 



Fig. 3. Cross section of the same tie. 



^ fgfv '4.' Cross section of white oak tie, shown in Plate 

 \>, III, Fig. 3, sap-rotted by Stereum fasciatum. 



r r ', r r r 



Fig. 5. Cross section of red oak tie rotted by Lenzites 

 betulina. 



Fig. 6. Longitudinal section of same tie. The light areas 



are thoroughly rotted. 







Fig. 7. Longitudinal section of red gum tie shown in 

 Plate I, Fig. 2, rotted by Polystictus versi- 

 color. 



Fig. 8. Cross section of same tie showing complete de- 

 cay throughout. 



Fig. 9. Cross section of a white oak tie showing the 

 sap-rot produced by Polystictus versicolor and 

 Stereum fasciatum invading the heartwood. 



