Trifolium dubium Sibth.
Coefficient of Conservatism: *
Coefficient of Wetness: 3
Wetness Index: FACU
Physiognomy: Ad A-Forb

Fields, roadsides, and turf; can be a serious weed of lawns. The oldest Michigan collections seen is 1894 from Bay Co.

The corolla is less strongly veined than in T. campestre but more strongly than in Medicago lupulina, which T. dubium resembles rather closely, but in which the veins are scarcely if at all evident. The terminal leaflet is sometimes not distinctly stalked.


Bay County
Berrien County
Calhoun County
Genesee County
Ingham County
Isabella County
Jackson County
Kalamazoo County
Kent County
Leelanau County
    Only on Fox Islands
Lenawee County
Montcalm County
Newaygo County
Shiawassee County
St. Clair County
St. Joseph County
Washtenaw County


MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. July 29, 2021.