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FuRTHEE Notes on Timothy Rust. 



By a. G. Johnson. 



At the last two annual meetings of the Academy, papers on timothy 

 rust, [Piiccinla poculiformis (Jacq.) Wettst.], were presented by Mr. 

 Frank D. Kern, and it is of interest to note at this time the present known 

 distribution of the disease over the State as well as to record here the 

 extension of its range into other States and provinces from which it has 

 not been previously reported. 



As was predicted in Mr. Kern's papers, the distribution of the rust 

 has become more general. In this State it evidently occurs wherever timo- 

 thy is raised. During the past season the writer has collected it at widely 

 separated points, as follows: Mount Yernon (Posey Co.) on the south- 

 west; Wirt (Jefferson Co.) to the southeast; Richmond (Wayne Co.), 

 east central; Columbia City (Whitley Co.), Laketon (Wabash Co.), and 

 Logansport (Cass Co.), north central; LaFayette (Tippecanoe Co.), west 

 central. Besides these collections, specimens of the rust have been re- 

 ceiA'^ed from Mr. Guy West Wilson and Mr. C. D. Learn, both collections 

 from Carmel (Hamilton Co.), central; and it was reported last year from 

 Columbus (Bartholomew Co.). This covers the State in such a way as to 

 lead one to be reasonably certain that the rust occurs throughout the 

 State wherever its host does. 



In addition to the states and provinces from which the rust has been 

 previously reported, specimens have been received from Dr. E. W. Olive, 

 collected at Brookings, S. Dak., who reports it as common there this year, 

 although not previously seen ; from Miss Irma A. Uhde, collected at Lake 

 Okoboji, Iowa ; and from Prof. W. P. Fraser, Pictou, Nova Scotia. These 

 localities in addition to those noted in Mr. Kern's paper last year make 

 the known distribution of this rust in North America as follows. S. Da- 

 kota, Minnesota, Iowa, Wisconsin, Indiana, Ontario, New York, Maine and 

 Nova Scotia. 



In most of the specimens seen, especially those from Indiana, the sum- 

 mer spores (urediniospores) were much the more abundant. Winter 

 spores (teliospores) developed in some cases but not abundantly. In certain 



