Anatomy of essential oils

Essentials oils are extracted from different parts of the plants.
The anatomy of essential oils deals with where the essentials oils are best extracted from.
Some parts of a plant may yield different essentials oils. 
Essentials oils can be sourced out from different parts in varied concentrations and differ in their scents and therapeutic qualities.
Resins are usually from the congealed saps of trees or plants
like frankincense, galbanum, myrrh. 
The essential oils are extracted from these congealed resins.
Florals scents are usually extracted from flowers like roses, jasmine, ylang ylang. 
More woodsy scents are from the bark or the plant or tree like cedarwood, sandlewood.
Usually the scent will reveal what part the essential oils are yielded from. 
Concertrations of essential oils in a plant or tree are found 
in varied strengths depending on the anatomy of the plant.

Berries ▪   Allspice ▪   Juniper Seeds ▪   Almond ▪   Anise ▪   Buchu ▪   Celery ▪   Cumin ▪   Nutmeg oil Bark ▪   Cassia ▪   Cinnamon ▪   Sassafras Wood ▪   Camphor ▪   Cedar ▪   Rosewood ▪   Sandalwood ▪   Agarwood Rhizome ▪   Galangal ▪   Ginger

Leaves ▪   Basil ▪   Bay leaf ▪   Buchu ▪   Cinnamon ▪   Common sage ▪   Eucalyptus ▪   Lemon grass ▪   Melaleuca ▪   Oregano ▪   Patchouli ▪   Peppermint ▪   Pine ▪   Rosemary ▪   Spearmint ▪   Tea tree ▪   Thyme ▪   Tsuga ▪   Wintergreen Resin ▪   Benzoin ▪   Copaiba ▪   Frankincense ▪   Myrrh

Flowers ▪   Cannabis ▪   Chamomile ▪   Clary sage ▪   Clove ▪   Scented geranium ▪   Hops ▪   Hyssop ▪   Jasmine ▪   Lavender ▪   Manuka ▪   Marjoram ▪   Orange ▪   Rose ▪   Ylang-ylang Peel ▪   Bergamot ▪   Grapefruit ▪   Lemon ▪   Lime ▪   Orange ▪   Tangerine Root ▪   Valerian