Stems: slender, branched above. Leaves: lanceolate, acute, entire, sagittate-clasping at the base. Flowers: racemose. Fruit: silicles small, globose, wingless, reticulated, indehiscent. Not indigenous.

This herb is usually one to two feet high and has lance-shaped leaves with even margins, which are arrow-head-shaped and clasping at the base, and grow all up the slender stems. The small ascending yellow flowers form elongated racemes. This is an introduced plant.