Canola refers to both an edible oil (also known as Canola oil) produced from the seed of any of several varieties of the rape plant, and to those plants, namely a cultivar of eitherrapeseed (Brassica napus L.) or field mustard/turnip rape (Brassica rapa subsp. oleifera, syn. Brassica campestris L.). Consumption of the oil is not believed to cause harm in humans and livestock. It is also used as a source of biodiesel.