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Onopordum acanthium L.
Common Name: COTTON-THISTLE, SCOTCH THISTLE
Coefficient of Conservatism: *
Coefficient of Wetness: 5
Wetness Index: UPL
Physiognomy: Ad B-Forb

A species of Europe and western Asia, the most common one of the genus in cultivation on this continent and the only one generally escaping. Fields, thickets, yards, roadsides, and disturbed sites. First collected in 1894 in Wayne Co.

A striking, robust plant with conspicuously winged stems and spiny-margined leaves covered with a cobwebby tomentum. The phyllaries are extremely numerous and taper into a long apical spine.

Locations

Ingham County
Kent County
Lapeer County
Mecosta County
St. Clair 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=412.