Cruciferae, Brassicaceae Brassica napus L.
Source: Magness et al. 1971
Rape oil is obtained from the seeds of several species of Brassica, and the oil from different species is not distinguished on the market, since all have similar properties. Production in the U.S. is limited, but rape oil is of major importance in Europe and Asia. The small, near globular seeds are borne in elongated, closed capsules. They contain 30 to 45 percent of a semi-drying oil. The oil is separated either by solvent extraction or by cold or hot pressing. The term "colza" refers to refined oil. The cold-pressed oil is used for edible purposes. Refined oil is used as a lubricant. The oil is also used for burning in lamps.