Essential oils may be found in different plant sources. For example in:
flowers and blossoms: jasmine, magnolia, neroli, rose
leaves: laurel, melissa officinalis, sage, thyme
seeds: anise, borage, coriander, cumin
rind: oak, cluster pine, cinnamon
roots: angelica, burnet, ginger, vetiver
resin: Styrax benzoe, maritime pine, myrrh, incense
wood: agarwood, rosewood, sandalwood, cedarwood
fruit rind: all citrus fruits