Lavender 40/42 is actually a blend of various lavenders. With its somewhat camphorous, crisp 'English Lavender' type aroma, it is the most widely recognized lavender in the world. This is probably due to the fact that the perfume industry uses this blend as a base for lavender scented products. This oil is obtained from the flowering parts of the plant. No worries on what to combine this with as it blends with everything! For a more floral type, see our Bulgarian Lavender. Used to treat burns, general all around tonic for relaxation. Great in the diffuser. No known toxicty. Generally regarded as safe. Dilute on the skin.