The species of Agropyron constitute a highly variable group. Especially is this true of forms occurring in the western part of the United States. The ones found in Iowa, although fewer in number and often clear cut in character, frequently present difficulties in classification. It is the purpose of this paper to clarify some of these difficulties and to point out the more constant characters. The more common variations observed by the author are also described. Distribution maps were also made, based upon material in the herbaria at Iowa State College, Grinnell College and the University of Iowa. Further distribution was recorded by personal observation and collection. Although not entirely complete, the material available does indicate the general distribution in the state.
Proceedings of the Iowa Academy of Science
©1939 Iowa Academy of Science, Inc.
Augustine, D. W.
"Iowa Species of Agropyron,"
Proceedings of the Iowa Academy of Science, 46(1), 97-104.
Available at: https://scholarworks.uni.edu/pias/vol46/iss1/11