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.

Onopordum acanthium L.
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.


Ingham County
Kent County
Lapeer County
Mecosta County
St. Clair County
Wayne County


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