Several individuals have studied the plant rusts in the driftless area of lowa. Of these, E. W. D. Holway, a Decorah banker, made by far the greatest contribution, having made the initial collection of 120 rusts in Iowa. Alois Kavorik of Spillville was also an early student of the rusts, frequently collecting with Holway. This paper summarizes the collections of these men and others, including our collections. A total of 132 plant rusts have been found in the driftless area. Of these, 28 have been found in Iowa only in the driftless area. In many cases, the host plant(s) for these rusts are found in other parts of the state in similar habitats
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