Memoir 109 



Plate III 



M 



> m 



; ^ I 





v^ 





CROSS SECTIONS THROUGH THE NODAL REGION OF THE CULM OF A 

 SMUTTED OAT PLANT (SWEDISH SELECT) SHOWING THE MYCELIUM 

 ni OSTILAGO iYENAE (5) 1\ THE PARENCHYMA CELLS BETWEEN 

 THE VASCULAR BUNDLES, mi (6) IN THE SCLERENCHYMA CELLS 

 Al>. i \< ENT TO THE VAsei LAR BUNDLES. X265 



The photographs were made from sections which were cut rather 

 thick. This was done to emphasize the abundance of mycelium 

 present. The lighter parts of the mycelium in the photographs are 

 those parts which were not directly in the plain- of focus. Their ap- 

 pearance is not due to degeneration 



