222 



Explanation of Plates. 



Fig. 



1. Uredosori on upper surface of leaf. 



2. Teleutosori on under surface. 



PLATE A. 



(All Figures vat. size.} 

 PUCCINIA TRITICINA ON WHEAT. 



PUCCINIA GRAMINIS ON WHEAT. 



3. Uredosori on upper and under surface, also on sheath. 



4. Teleutosori oa stem. 



