Common name for the crop plant Brassica napus. Distinctive because of it's bright yellow flowers. It is harvested for animal feed, and the oil that can be extracted from it. This has been touted as a potential replacement for diesel, as it's got a similar molecular structure, and can be mixed with diesel up to 20% by volume, and used without any engine adjustment (apparently, I've never tried it). So we may just end up running our wagons on it in the future, when oil reaches $100 a barrel.
A fun game with friends. See 'delayed consent'.