Table 1.

List of commercial essential oils, their scientific name, what plant part they originated from and the method used to extract them

Essential oil	Scientific name	Plant part used	Extraction method
Bergamot	Citrus bergamia	Zest	P
Bitter orange	Citrus aurantium var. armara	Bud	S
Black pepper	Piper nigrum	Fruit	S
Blue gum	Eucalyptus globulus	Leaf	S
Cajeput tree	Melaleuca leucadendron	Leaf	S
Cedarwood	Cedrus atlantica	Wood	S
Cinnamon	Cinnamomum zeylandicum	Bark	S
Citronella	Cymbopogon winterianus	Grass in flower	S
Clary sage	Salvia sclarea	Leaf	P
Clove bud	Syzygium aromaticum	Bud	S
Common thyme	Thymus vulgaris	Flower	S
Cypress	Cupressus sempervirens	Branch	S
Eucalyptus	Eucalyptus radiate	Leaf	S
Frankincense	Boswellia carterii	Sap	S
Geranium	Pelargonium roseum	Aerial part	S
Ginger	Zingiber officinale	Rhizome	S
Grapefruit	Citrus paradisi	Zest	P
Hyssop	Hyssopus officinalis	Leaf	S
Juniper	Juniperus communis	Fruit	S
Lemon peel	Citrus limon	Zest	P
Lemongrass	Cymbopogon citratus	Plant	S
Myrrh	Commiphora myrrha	Flower & wood	S
Niaouli	Melaleuca viridiflora	Leaf	P
Patchouli	Pogostemon cablin	Leaf	S
Peppermint	Mentha piperita	Leaf	S
Rosemary	Rosmarinus officinalis	Leaf and flower	S
Sandalwood	Santalum austrocaledonicum	Wood	S
Scotch pine	Pinus sylvestris	Needle	S
Sweet basil	Ocimum basilicum	Flower and leaf	S
Sweet marjoram	Origanum majorana	Flower and leaf	S
Sweet orange	Citrus sinensis	Zest	P
Tea-tree	Melaleuca alternifolia	Leaf	S
True lavender	Lavandula vera	Leading flower	S
Ylang-ylang	Cananga odorata	Flower	S

P pressure extraction, S steam distillation