wild mustard
Brassica kaper                                   

Identifying Characteristics:

Seed:   round, smooth seed with dull surface; reddish brown to black in color

Seedling:  lanceolate, lobed leaves with serrated margins; sparsely pubescent; upper leaves oblong to ovate; clasping, sessile upper leaves

Mature Plant:  basal rosette with upright growth habit once bolted; yellow flowers with 4 petals; long, slender siliques; beak at end of seed pod; 10 to 20 seeds per pod

Method of Propagation: seed

Life Cycle: cool-season annual, warm-season annual

Similar Species: canola - compare pods

References: Abaye, A. Ozzie. "Identification & Adaption: Common Grasses, Legumes & Non-leguminous Forbs of the Eastern United States."
Bryson, Charles T. & Michael S DeFelice. "Weeds of the Midwestern United States & Central Canada."