Memoir 109 



Plate II 



..A*S* 



«•?*' 



tr 





3, WING OF THE INNER GLUME OF A MATURE OAT (SWEDISH 



SELECT), showing the production of "gemmae" from the my- 

 celium OF USTILAGO AVENAE. :205 



4. EPIDERMIS OF THE PERICARP OF A MATURE OAT (SWEDISH SE- 

 LECT), SHOWING GERMINATION OF SPORES AND PENETRATION OF THE 

 CELLS WHICH HAS TAKEN PLACE IN STORAGE FROM SPORES APPLIED 

 AFTER HARVEST. X225 



