The Polygonums have been reviewed with the view to find out their occurrence and distribution in the state of Iowa. Twenty species are found in the state. Grateful acknowledgment is made to Dr. L. H. Pammel and Mr. R. I. Cratty of the State College at Ames, and to Professors Shimek and Wylie of Iowa City, for the use of their herbarium collections. In the following lists, the paper shows Polygonum as represented in the Grinnell herbarium and the two main herbaria of the State.
Proceedings of the Iowa Academy of Science
©1923 Iowa Academy of Science, Inc.
Wittrock, G. L.
"Polygonum in the State of Iowa,"
Proceedings of the Iowa Academy of Science, 30(1), 345-349.
Available at: https://scholarworks.uni.edu/pias/vol30/iss1/55