172 



IOWA ACADEMY OF SCIENCE Vol. XXVI, 19i:) 



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Fig. 42. — Rust and Barberry plants in Manchester, 

 grass, timothy and oats. (C. M. King.) 



Infection on orchard 



Iowa ; as well as at Kansas City, Missouri. It is less common at 

 Sioux City, Thorpe, Logan, Fonda, Pocahontas, Garner, Humboldt 

 and Forest City, Iowa. It is also less common in the region to the 

 north of these points in Minnesota. The Puccinia graminls was 

 common in this grass at Manchester, Iowa, not far from the bar- 

 berry bush. I also found this rust on the same grass at Thorpe in 

 northwestern Iowa. I looked for it at many other points, such as 

 Clinton, Dubuque, McGregor, Sioux City, Council Bluffs, Hamburg, 

 East Dubuque, Iowa ; LaSalle, Illinois ; Sioux Falls, South Dakota, 

 without finding it. I have foimd P. graminis and P. coronata on 

 this host at Ames. Though this orchard grass at East Dubuque was 



