Erucastrum gallicum is an annual or biennial plant in the mustard family known by the common names hairy rocket and common dogmustard. It is a weedy plant with an erect upright habit or sometimes with ascending tops with bright yellow flowers. Plants bloom in late spring, as plants bloom the stems extend upward and when finished blooming plants are 30 to 60 centimeters long. The plant is native to Eurasia but is an introduced species in many areas of the world, including much of North America.