Upright annual or biennial that grows 1.5 – 7 feet tall. Has serrated leaflet edges with three leaflets per leaf. Has white or yellow flowers and as extensive taproot. The white-flowered sweetclover (M. alba) is talker, coarser-stemmed, and has coarser leaves than the yellow-flowered type (M. officinalis). Yellow sweetclover is more drought tolerant, more vigorous as a seedling, flowers earlier, and has spreading growth.
Daren Redfearn and Bruce Anderson – University of Nebraska
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James Hoorman, Alan Sundermeir, and Rafiq Islam- Ohio State University Extension
Jim Hoorman, Ohio State University Extension
James Hoorman and Randal Reeder, Ohio State University Extension