Leaf is the largest category of essential oils, as most aromatic plants contain essential oil glands in their leaves. Many Mediterranean edible herbs, such as oregano, basil, and bay laurel, release essential oils from their leaves when heated, which suggests that cooking may once have been the earliest method of essential oil extraction. Aromatherapy Oils have been used for thousands of years in various cultures for medicinal and health purposes. Some botanicals store their precious essential oil within their leaves or flowers while others may store the beneficial oil within their rinds, seeds or other plant parts. As this is the part of the tree or plant which breathes, it is not surprising that essences made from them support the human respiratory system.
The below list is offered as a guideline to the essential oils and absolutes that are commonly distilled or extracted from the leaves of certain plants.
•Basil
•Bay
•Bergamot
•Cajuput
•Cinnamon
•Clary Sage
•Cypress
•Eucalyptus
•Geranium
•Hyssop
•Lemongrass
•Marjoram
•Myrtle
•Niaouli
•Oregano
•Palmarosa
•Patchouli
•Petitgrain
•Peppermint
•Ravensara
•Rosemary
•Saro
•Tea Tree
•Thyme
•Tobacco
•Violet
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