Sisymbrium altissimum L.
Common Name: TUMBLE MUSTARD
Coefficient of Conservatism: *
Coefficient of Wetness: 3
Wetness Index: FACU
Physiognomy: Ad A-Forb

Sisymbrium altissimum flowers J. Morefield flowers

A native of Eurasia, widespread as a weed. The earliest Michigan specimen seen is from Berrien Co. in 1896, but collections were made in Kent and St. Clair Cos. the following year, and the species is now found throughout on sandy or gravelly roadsides, shores, fields, railroads, gravel pits; spreading into forests.

This is an easily recognized species, with its pinnatisect leaves (the upper ones often resembling a Myriophyllum leaf) and elongate linear siliques on thick pedicels, so that the fruit and pedicel appear to be one at first glance. The petals are a paler yellow than the bright ones of our other species.

Locations

Alcona County
Alger County
Alpena County
Antrim County
Arenac County
Baraga County
Bay County
Benzie County
Berrien County
Calhoun County
Charlevoix County
    Including Beaver Island
Cheboygan County
Chippewa County
Clare County
Clinton County
Crawford County
Eaton County
Emmet County
Genesee County
Grand Traverse County
Gratiot County
Hillsdale County
Houghton County
Ingham County
Iosco County
Isabella County
Jackson County
Kalamazoo County
Kent County
Keweenaw County
    Including Isle Royale
Leelanau County
    Including Fox Islands
    Including Manitou Islands
Lenawee County
Livingston County
Mackinac County
    Including Bois Blanc, Mackinac, Round Islands
Macomb County
Manistee County
Marquette County
Mecosta County
Menominee County
Midland County
Missaukee County
Monroe County
Muskegon County
Newaygo County
Oakland County
Oceana County
Ogemaw County
Ontonagon County
Oscoda County
Ottawa County
Roscommon County
Saginaw County
Schoolcraft County
St. Clair County
St. Joseph County
Washtenaw County
Wayne County

Citation:

MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. December 13, 2017. http://michiganflora.net/species.aspx?id=679.