'English lavender' oil is extracted from the flowers of Lavandula angustifolia, while 'Lavandin' oil is made from Lavandula x. intermedia, a hybrid cross between Lavandula angustifolia and Lavandula latifolia (Spike Lavender). Near infrared spectroscopy not only gives a very rapid and inexpensive method to tell the difference between these two types of oil, but also allows the composition of oils to be accurately measured.
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