Plant Form Upright annual or biennial rosette herb. Size 40 cm to 1 m tall. Stem Long, thin, covered in stiff hairs. Leaves 15-20 cm long deeply lobed and variable at base, decreasing in size further up. Flowers Four yellow to white petals with purple veins in propellor shape, each petal up to 2 cm long. Fruit and Seeds Variable form but long and narrow 2-9 cm long on stalk 1-2.5 cm long. Habitat Roadsides, wasteland, vacant land. Distinguishing Features Fruit breaks into ribbed 1-seeded units, flowers are slightly different in appearance to most other Brassicaceae. Impacts Reduces crop yield, contaminates seed, taints meat and dairy.