Berberis thunbergii DC.
Coefficient of Conservatism: *
Coefficient of Wetness: 3
Wetness Index: FACU
Physiognomy: Ad Shrub

Berberis thunbergii fruits up close A. A. Reznicek fruits up close

A native of Asia, widely cultivated, especially for hedges, and increasingly frequently escaping into forests, swamps, fields, and dunes. First collected in 1909 in St. Clair Co.

Doubtless dispersed largely by birds that eat the bright red fruit; may become invasive in some woodland settings. 

A few vegetative collections have 3-forked rather than simple spines at the nodes, with larger leaves than expected in B. thunbergii, and are probably B. ×ottawensis C. K. Schneid., a hybrid with B. vulgaris.


Alcona County
Allegan County
Alpena County
Baraga County
Barry County
Bay County
Benzie County
Berrien County
Calhoun County
Clare County
Clinton County
Dickinson County
Eaton County
Emmet County
Genesee County
Gogebic County
Grand Traverse County
Gratiot County
Hillsdale County
Houghton County
Ingham County
Isabella County
Kalamazoo County
Kent County
Lapeer County
Leelanau County
Lenawee County
Livingston County
Luce County
Mackinac County
    Only on Bois Blanc, Mackinac, Round Islands
Marquette County
Mason County
Montcalm County
Muskegon County
Newaygo County
Oakland County
Ontonagon County
Otsego County
Ottawa County
St. Clair County
St. Joseph County
Tuscola County
Van Buren County
Washtenaw County


MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. May 26, 2022.