Please try our next iteration of the Michigan Flora Online here. Beginning on February 1, 2023, will point to this new site.

The new site offers several benefits over the existing website, including real coordinate mapping, giving a clearer view of the density of documentation as well as more precision about plant distributions and their link to landforms. We will also have the ability to update species pages more regularly, both in terms of new collections and as more existing Michigan specimens are georeferenced. In addition, we have a better photo display, and offer indented keys.

Centaurea jacea L.
Coefficient of Conservatism: *
Coefficient of Wetness: 5
Wetness Index: UPL
Physiognomy: Ad P-Forb

A native of Europe, local along gravelly roadsides, parking lots, fields, shores. Collected in disturbed places as early as 1895, in Bay Co.

Plants with enlarged marginal flowers and brown phyllary appendages, but with some of the middle and outer appendages strongly fringed, are hybrids with C. nigra, named C. ×moncktonii C. E. Britton (C. ×pratensis of Michigan Flora). There is full gradation toward the parents, especially C. jacea.


Alpena County
Bay County
Chippewa County
    Including Drummond Island
Gogebic County
Iron County
Kalamazoo County
Luce County
Mackinac County
Marquette County
Mecosta County
Menominee County
Monroe County
Montmorency County
Oakland County
Schoolcraft County
Washtenaw County
Wayne County


MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. January 30, 2023.