Rhamnus cathartica L.
Coefficient of Conservatism: *
Coefficient of Wetness: 0
Wetness Index: FAC
Physiognomy: Ad Tree

Rhamnus cathartica Ann Arbor Natural Area Preservation

A Eurasian species, sometimes cultivated, and in southern Michigan, a serious invasive pest, forming thickets in vacant lots, at borders of forests, along roadsides, fencerows, railroads, river banks, and clearings; occasionally in swamps. First collected in Michigan at Ann Arbor, Washtenaw Co., in 1914, but in the next two years recorded as plentiful and naturalized around Birmingham and Bloomfield Hills, Oakland Co. Now a pernicious weed, especially in forests near urban areas.

See under Rhamnus utilis for comments on hybridization.


Allegan County
Antrim County
Baraga County
Berrien County
Calhoun County
Dickinson County
Emmet County
Gogebic County
Hillsdale County
Ingham County
Iron County
Isabella County
Jackson County
Kalamazoo County
Kent County
Lake County
Lenawee County
Livingston County
Mackinac County
Mason County
Mecosta County
Menominee County
Midland County
Monroe County
Montcalm County
Muskegon County
Oakland County
Ottawa County
Saginaw County
Schoolcraft County
Tuscola County
Washtenaw County
Wayne County


MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. December 2, 2022. https://michiganflora.net/species.aspx?id=2414.