Common Name: FIELD SOW-THISTLE, PERENNIAL SOW-THISTLE
Coefficient of Conservatism: *
Coefficient of Wetness: 3
Wetness Index: FACU
Physiognomy: Ad P-Forb
Roadsides, railroads; meadows, shores, disturbed wetlands and dikes; fields, weedy among crops and in gardens; disturbed sites, including fill, parking lots, dumps. Collected at Lansing (Ingham Co.) as long ago as 1867, but not gathered again until the 1890’s in several counties (Bay, St. Clair, Tuscola, Wayne); now all too common throughout the state.
In S. arvensis subsp. arvensis, the involucres and pedicels bear numerous stiff hairs tipped with dark glands. More common in Michigan is subsp. uliginosus (M. Bieb.) Nyman (var. glabrescens Günther, Grab. & Wimmer), which lacks the glandular hairs and may average slightly smaller involucres.
R. W. Smith
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Alcona |
Alger |
Allegan |
Alpena |
Antrim |
Arenac |
Baraga |
Barry |
Bay |
Benzie |
Berrien |
Calhoun |
Charlevoix |
Cheboygan |
Chippewa |
Clinton |
Crawford |
Delta |
Dickinson |
Eaton |
Emmet |
Gladwin |
Gogebic |
Grand Traverse |
Gratiot |
Hillsdale |
Houghton |
Huron |
Ingham |
Iosco |
Iron |
Isabella |
Kalamazoo |
Kent |
Keweenaw |
Lake |
Lapeer |
Leelanau |
Lenawee |
Livingston |
Mackinac |
Macomb |
Marquette |
Mason |
Mecosta |
Menominee |
Missaukee |
Monroe |
Montcalm |
Montmorency |
Muskegon |
Newaygo |
Oakland |
Oceana |
Ontonagon |
Oscoda |
Ottawa |
Presque Isle |
Roscommon |
Saginaw |
Sanilac |
Schoolcraft |
Shiawassee |
St. Clair |
Tuscola |
Van Buren |
Washtenaw |
Wayne |
Citation:
MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. March, 17, 2025
https://lsa-miflora-p.lsait.lsa.umich.edu/#/record/473