Also known as Key Lime, Citrus aurantifolia is a small evergreen tree that produces a small, sour fruit very similar to Lemon, and like lemon, has a high content of citric acid, but typically less ascorbic acid. This Lime has a strong, sweet fragrance. Historically, limes were brought back to Europe by Columbus. They were used to prevent sailors from developing scurvy, which is how the British, a sea-faring nation, earned the nickname 'Limey'.Cautions: This oil has phototoxic properties and exposure to the sun must be avoided after application to the skin. Due to their presence, please consult a physician prior to using this oil. Dilute well before use; for external use only. May cause skin irritation in some individuals; a skin test is recommended prior to use. Contact with eyes should be avoided.