Canola is a trademark for a seed oil with low erucic acid, but it's still rapeseed oil, just like Cosmic Crisp is still just an apple.
And Granny Smith apples are green. I don't think anyone would ever mistake one for a Red Delicious apple.
>In 1985, the U.S. Food and Drug Administration (FDA) recognized rapeseed and canola as two different species, based on their content and uses.
Biology by Bureaucracy.