Do not use on any part of the body because of phototoxic effects. Rue Oil is steam distilled from freshly harvested, blooming or fruit bearing, wild growing plants of Ruta Montana, cultivated plants of Ruta Graveolens, or other species of Ruta. The plants are natives of the Mediterranean countries and they grow wild in Spain, Morocco, Corsica, Sardinia and Algeria. Cultivation also takes place in France and Spain, to a small degree in Italy and Yugoslavia. Spain is the largest producer of rue oil. Rue Oil is a yellow to orange yellow material, liquid at room temperature, but solid at lower temperature. Its odor is sharp herbaceous, distinctly fruity orange like, with a characteristic bitteracrid backnote that makes the overall impression an unpleasant one. For most people, however, rue oil is harmful to the mucous membranes and will often irritate the skin. On account of certain haemorrhage producing effects of the oil when taken internally.