Many botanists, including students who have studied the Primulaceae from a world viewpoint, consider Lysimachia and Steironema as one genus. Lysimachia is here considered in this broad sense. Authentic material of five species and one variety from North Dakota, described by Greene and by Lunell, has not been seen, but any Iowa specimens examined that seemed to possibly agree with the original descriptions of the Dakota plants did not appear to be sufficiently distinct from the earlier described species, listed below, to warrant separating them.
Proceedings of the Iowa Academy of Science
©1942 Iowa Academy of Science, Inc.
Goodman, George J. and Leyendecker, P. J.
"The Genus Lysimachia in Iowa,"
Proceedings of the Iowa Academy of Science, 49(1), 211-212.
Available at: https://scholarworks.uni.edu/pias/vol49/iss1/28