Solanum rostratum Dunal
Common Name: BUFFALO-BUR
Coefficient of Conservatism: *
Coefficient of Wetness: 5
Wetness Index: UPL
Physiognomy: Ad A-Forb

Native west of the Great Lakes, but an unpleasant weed in our area. Farmyards, pastures, flower beds, roadsides, gravel pits, fields, dump heaps, railroads, and other disturbed ground, though apparently not lasting long in a given site. The earliest Michigan collection seen is from Lansing (Ingham Co.) in 1871, but there are no others until several counties in the 1890’s.

This species seems to be less often a cause of poisoning than S. carolinense, perhaps because its spine-covered fruits are so unattractive to ingest. It was the original native host of the Colorado potato beetle.


Bay County
Berrien County
Charlevoix County
    Only on Beaver Island
Cheboygan County
Gogebic County
Hillsdale County
Houghton County
Ingham County
Kalamazoo County
Kent County
Lake County
Lenawee County
Livingston County
Mackinac County
Manistee County
Midland County
Muskegon County
Oakland County
Otsego County
St. Clair County
St. Joseph County
Washtenaw County
Wayne County


MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. June 29, 2022.