326 PROCEEDINGS OF THE INDIANA ACADEMY OF SCIENCE, 



London, Ontario, on May 20, 15^11, corresponds closely with mine. All of 

 the other collections of leaves bearing aeeia are undoubtedly Uromyces 

 trifolii on related species of clover. 



Pathology. 



The striking feature of the leaves bearing aecia is that they blacken and 

 wilt in a very short time. The mj-eelium causes rapid necrosis. It is for this 

 reason that the writer believes that the collection of the aeeial stage of this 

 rust is difficult. 



During the latter part of the summer the plant was badly rusted and bore 

 urediniaspores of Uromyces fallens continuously. The plant died during the 

 folloA\'ing winter. 



Kern, F. D. Phytopathology 1; 1, 1911. 



Lire. J. Ivan (J. ]. Lindroth — F. D. Kern) in Acta See. pro Fauna et Flora Fennica, 

 29:15. 1906. 



