You might see lavender 40/42 available for purchase. These numbers "indicate the linalyl acetate content; in this case, they indicate the product contains 40%-42% of linalyl acetate. Lavender 40/42 is generally a blend of various lavenders in order to get a consistent scent from batch to batch, with processors adding linalyl acetate to cover the smell of camphor or borneol components of a given lavender." (From Camden Grey). You might see it listed as Lavandula officianalis and its origin as France.