Sinapis arvensis L.

• Authority

  Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.

• Family

  Brassicaceae

• Scientific Name

  Sinapis arvensis L.

• Description

  Species Description - Rough-hairy to subglabrous annual 2–8 dm; lvs obovate, the lower coarsely toothed or sometimes lobed, the upper progressively reduced, merely toothed; fls 1.5 cm wide; mature pedicels ascending, 5 mm; frs ascending, linear, subterete, the body 1–2 cm × 1.5–2.5 mm, smooth or rarely bristly; beak flattened-quadrangular, commonly half as long as the body; seeds 7–13, smooth, 1–1.5 mm; 2n=18. A European weed, now widespread in fields, gardens, and waste places in the U.S. May–July. (Brassica arvensis; B. kaber)

• Common Names

  charlock