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How do essential-oil droplets spread a plant’s fragrance through the air?

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Essential oils are stored within plants as microdroplets inside specialized glands, sometimes referred to as osmophors. To release a plant's fragrance into the air, these droplets first diffuse through the walls of the glands. Once they reach the exterior, the droplets spread over the surface of the plant before evaporating, which fills the surrounding air with perfume.12