What plant does canola oil come from? Where is it grown?

Is it a tree or a bush or just a small plant?What plant does canola oil come from? Where is it grown?
rapeseed or Brassica campestris





they are both small plants and were originally grown in Canada but are now just a North American cash cropWhat plant does canola oil come from? Where is it grown?
Canola is an artificial word, it come from Canadian Oil and the Rapeseed plant a type of grass/cereal.

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