Mustards belong either to the Brassica or Sinapsis genera. Mustards are upright cool-season annuals that grow 3-5 feets tall. They have narrow leaves, yellow flowers, a strong taproot, and fibrous and lateral roots.
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Tim Harrigan, Dale Mutch, and Sieg Snapp- Michigan State University
Sieg Snapp, K. Date, K. Cichy and K. O’Neil – Michigan State University