Oil and triglyceride contents and fatty acid composition were determined for seeds in nine taxa belonging to the genus Coincya (Brassicaceae) on the Iberian Peninsula (Spain and Portugal). The oil content ranges from 11.1 to 24.6%, triglycerides from 68.7 to 88.5%. The major fatty acids were erucic (24.6-30.5%), linolenic (17.7-27.7%), linoleic (13.9-24.6%) and oleic acid (12.3-21.8%).