A survey of the vascular plants of southwestern Iowa was made by the writer in order to obtain more adequate data on the flora of that region. The area considered in this investigation consists of approximately five thousand square miles in the extreme southwestern corner of the state, most of which lies in the drainage basin of the Missouri River. (See Fig. 1) Sixteen counties comprise the primary sphere of study, extending four tiers of counties east from the Missouri River, and four tiers of counties north of the Iowa-Missouri state line. The sixteen counties, listed in alphabetical order, are as follows: Adair, Adams, Audubon, Cass, Fremont, Guthrie, Harrison, Madison, Mills, Montgomery, Page, Pottawattamie, Ringgold, Shelby, Taylor, and Union. Occasional collections were made in Carroll, Greene, and Monona counties. Species collected in those three counties, plus a small number which were collected in Decatur County by others, are also included.
Proceedings of the Iowa Academy of Science
©1953 Iowa Academy of Science, Inc.
Fay, Marcus J.
"A Preliminary Report on the Flora of Southwestern Iowa,"
Proceedings of the Iowa Academy of Science, 60(1), 119-121.
Available at: https://scholarworks.uni.edu/pias/vol60/iss1/16