Trifolium dubium Sibth.
Family: Fabaceae
Suckling Clover,  more...
Trifolium dubium image
Much like no. 16 [Trifolium campestre Schreb.]; stalk of the terminal lfl scarcely 1 mm; heads smaller, 5-10 mm, commonly with 5-15 fls each 2.5-3.5 mm; standard inconspicuously veined; 2n=28, 32. Native of Europe, established as a weed in waste ground throughout much of N. Amer. Summer.

Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.

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From Flora of Indiana (1940) by Charles C. Deam
In 1909 I found this species in gravelly soil among the cottages on the north side of Lake Wawasee. It has been collected in St. Joseph County by Nieuwland, and on May 17, 1930, Nieuwland and Just again collected it in St. Joseph County on the bank of the St. Joseph River behind St. Mary's College.