Scientific NameBrassica napus
Rapeseed is a winter annual or it can be a bienniel.
Leaves are generally around 7-30cm long and 3-10cm wide, and are arranged alternately. Lower leaves are dissected into 4-11 rounded segments. Leaf margins can be entirely smooth or toothed.
Rapeseed grows from a large tuberous taproot. Stems are hairless.
Flower Seed Head
Flower petals are a bright yellow. The flowerhead is elongate with individual flower stalks each around 5-6mm long.
The seed pod is 5-7cm long and smooth.
Rapeseed is found in disturbed habitats. It can also appear as a remenent of cultivation.
upright and nonwoody
Thorns or Spines
Dominant Flower Color
shorter than leaf
Stem Cross Section
round or oval
corm/ enlarged stem/ nutlet