22 4 



Explanation of Plates. 



PLATE B. 



(All Figures nat. size.) 

 PUCCINIA LOLII AVENAE ON OATS. 



5. Uredosori on under surface of leaf. 



6. Teleutosori on under surface 



Fig. 



PUCCINIA LOLII ON RYE-GRASS. 



7. Uredosori on under surface of leaf. 



8. Teleutosori on upper surface. 



PUCCINIA SIMPLEX ON BARLEY. 



9. Teleutosori on sheath and blade. 

 10. Uredosori on under surface of leaf. 



