Fact Check Please

I just started reading Sun of Suns by Karl Schroeder and I came to this:

Three miles up to the left, a farm caught the suns’ light: within a net a hundred feet across, the farmer had gathered pulverized rock and soil, and was growing a crop of yellow canola. Each plant clutched its own little ball of mud and they all tumbled about slowly, catching and losing the light in one another’s shadow.

Canola isn't a plant. It's a type of oil and the name is a sort of acronym that stands for Canadian Oil Low Acid. The reason it's got that name instead of something simple like corn or safflower oil is because it's made from rapeseed oil and the market for rape oil is rather limited.