Scientific NameSisymbrium offcinale
Synonyms (former Scientific Names):
Seedlings have club-shaped cotyledons. Mature plants first produce a basal rosette then flowering stems reaching 30 cm to 1 m tall. Root is made up of a slender branching taproot.
Leaves are pinnately lobed with deeply toothed margins. Both sides of the leaves are covered with bristly hairs and the end of the leaf has the largest segment.
Yellow flower petals are less than 3 mm long and fruit less than 1.5 cm long.
Flower Seed Head
Clusters of yellow flowers on the ends of long flower stems appear June through September. Flowers have 4 petals 1 to 2.5 mm long.
Fruit is awl shaped measuring less than 1.5 cm in length with 2 compartments containing 20 seeds each. Seeds 1-1.5 mm long, are egg or triangle shaped and reddish brown in color.
Across most of the United States this species prefers dry loamy, sandy, or stony soils. Nursery, horticultural and agricultural crops are all home to hedge mustard.
upright and nonwoody
Thorns or Spines
Approximate Flower Diameter
Dominant Flower Color
shorter than leaf
Stem Cross Section
round or oval