Forty years ago a "preliminary list" of the rusts (Uredinales) of Iowa was published by the writer. It was the first list, and up to the present time is the only list of Iowa rusts to be published. That first list numbered 134 species, as they were then rated, the list now presented numbers 164 species, as they are now understood.
Proceedings of the Iowa Academy of Science
©1924 Iowa Academy of Science, Inc.
Arthur, J. C.
"The Uredinales (Rusts) of Iowa,"
Proceedings of the Iowa Academy of Science, 31(1), 229-255.
Available at: https://scholarworks.uni.edu/pias/vol31/iss1/47