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Centaurea jacea L.
Common Name: BROWN KNAPWEED
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.

Locations

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

Citation:

MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. January 30, 2023. https://michiganflora.net/species.aspx?id=271.