228 



IOWA ACADEMY OF SCIENCE Vol. XXVI, 1919 



of some eighty acres. In all cases the wild plants were observed on 

 the slope of the hills from seventy-five to ninety rods from the 

 hedge. In some cases these wild plants were loaded with fruit. 

 Mr. Johnson states that there was one large plant on the river 



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berry 



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I 



Fig. 77. — W^ild Barberry on .Johnson place near LeClaire. Original liedge un 

 liighway. Oats not fit to harvest. 



bottom, a little over a quarter of a mile away. The wild plants in 

 the pasture are perhaps thirty years old. On a single large clump 

 in the hedge, I estimated 30,000 seeds. In some cases there are 

 even as high as 40,000. Red top and timothy in the vicinity were 

 badly rusted, .\ccording to Professor Bliss, wheat in the vicinity 

 was also badly rusted. However, Mr. Johnson does not think the 

 barberry is responsible for the rust on grain. 



