Lavender, French (Lavendula angustifolia) A native Mediterranean shrub, lavender is the most popular oil in aromatherapy for its wide array of properties, lack of toxicity and balanced aroma. It is steam distilled from the flowering tops. This French lavender is standardized to have a minimum ester content (linalyl acetate) of at least 40% to ensure a consistent floral scent. Among many therapeutic and healing properties, it has calming, soothing and relaxing effects. It is one of the only essential oils that are safe for undiluted use. The aroma is a soft, powdery floral that blends well with any oil.