From Flora of Indiana (1940) by Charles C. Deam
Extensively used throughout the state for grazing and fodder. It has become a frequent escape along roadsides and more rarely along railroads and in waste places and open woodland. I have rarely collected this and the next species [Medicago lupulina] so that the maps do not indicate the frequency with which this plant has escaped.
Decumbent or loosely erect, to 1 m; fls blue-violet; pods coiled into 1.5-4 complete turns. Native of the Caspian area, widely cult. and escaped in temperate regions, found throughout the U.S. and s. Can.
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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