Recently I had a distributor mention she had once heard some oils have a cortisone-like effect. This intrigued me so I did a little research on the subject. This is what I discovered from reading Dr. Stewart's book: "The Chemistry of Essential Oils Made Simple":
Page 576 states "Talking about Ester. Bornyl acetate prevails among the evergreen trees and shrubs (Spruce, Tsuga, Balsam Fir, Juniper, White Fir, Douglas Fir, Rosemary Verbenon, Thuja, Silver Fir, Cistus). It is the fragrance we associate with a coniferous forest of pines, spruce, fir, and other needle-bearing trees. It is energizing, empowering and mentally clearing. Linalyl acetate has a floral fragrance which you can identify in all six of the oils above that contain it (Petitgrain, Lavandin, Bergamot, Lavender, Neroli, Lemongrass). It is calming, soothing, and emotionally releasing. Geranyl acetate is also a floral fragrance, but with a sharper, greener note (Palmarosa, Lemongrass, Marjoram). It helps release tensions and leads to relaxation. a-Terpinyl acetate has a grounding effect and can help with mental, emotional, and physical detoxification (Cardamon, Bay Laurel, Cypress). Methyl salicylate is actually a phenolic ester with a cortisone-like effect (Wintergreen, Birch). It is analgesic, like aspirin, and is supportive of the bones and joints. It is also a detoxifying compound and a cleanser of cellular receptor sites."
And on page 268 of the above mentioned book "Methyl salicylate is a compound found in only two essential oils: birch and wintergreen, which is an anomaly in that birch and wintergreen are not botanically related at all."
The Chemistry of Essential Oils Made Simple would be a good book to have as a reference. I know I need to study it more! No wonder I enjoyed Big Cottonwood Canyon so much. I felt mentally, emotionally, and spiritually soothed! Take some time to enjoy the wonders of nature and their gifts. Go for a hike in the woods and enjoy the healing powers that are there for you. If you can't get there today, then bring the woods to you with some tree oils.