Coefficient of Conservatism:
Coefficient of Wetness:
A. A. Reznicek
Included in C. arvense in Michigan Flora.
A rare, tall, large-flowered species of savannas and forest edges.
St. Clair County
MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. October 24, 2019. https://michiganflora.net/species.aspx?id=746.