University of Alberta Museums Search

Scientific Name Brassica kaber (DC.) L. C. Wheeler Common Name wild mustard (Moss, 1983); yellow-flowered mustard (Johnson et al., 1995). General Description An annual plant that grows 20-80 cm tall and has branches that are purple at their base; flowers are yellow (Moss, 1983). Leaves Basal leaves divided into leaflets (pinnate); large terminal lobe; stem leaves sessile; toothed margin (Moss, 1983). 5-15 cm long (E-Flora BC). Flowers Petals 6-8 mm long (Moss, 1983). Terminal cluster; petals yellow; stalks 2-6 mm long; sepals 4-5 mm long (E-Flora BC). Fruits and Seeds Stalks 5 mm long; dry dehiscent pod (silique); ascending; slightly hairy; angular; 2-edged; seed dark brown to black; wrinkly at high magnification (Moss, 1983). Large beak at top of silique (Johnson et al., 1995). Phenology March to October (JSTOR). Notes 2n=18 (Moss, 1983). Also called Sinapis arvensis (E-Flora BC). Range/Distribution

Alberta: A few occurrences in the SW corner (Canadensys). Introduced in CAN (BC, MB, NB, NL, NS, SK, NT, ON, PE, QC, YT); USA (AK, AZ, AR, CA, CO, CT, DE, FL, GA, ID, IL, IN, IA, KS, KY, LA, ME, MD, MA, MI, MN, MS,…

Alberta: A few occurrences in the SW corner (Canadensys). Introduced in CAN (BC, MB, NB, NL, NS, SK, NT, ON, PE, QC, YT); USA (AK, AZ, AR, CA, CO, CT, DE, FL, GA, ID, IL, IN, IA, KS, KY, LA, ME, MD, MA, MI, MN, MS, MO, MT, NE, NV, NH, NJ, NM, NY, NC, ND, OH, OK, OR, PA, RI, SC, SD, TN, TX, UT, VT, VA, WA, WV, WI, WY) (USDA).

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