Coefficient of Conservatism:
Coefficient of Wetness:
A native of Asia, cultivated and rarely escaped. Collected in 1951 (F. W. Rapp Cass-663, MICH) at Jones, Cass Co., without further data.
The rays are blue-purple and the heads large, in corymbs.
MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. December 10, 2017. http://www.michiganflora.net/species.aspx?id=242.