Wintergreen - Plant Information

Wintergreen
Genus: Gaultheria Procumbens (G. Procumbens)
Family: Ericaceae
Perennial
USDA Hardiness Zone 3 - 8 (cooler 8)

Wintergreen can be substituted with sweet birch (betula lenta) in food products because it is easier to harvest and the volatile oil is about the same.(1)
Most wintergreen essential oil is synthetic. (1)

Well drained woodlands and clearings, acidic soils under the evergreen trees (PH as low as 4.5), high organic matter, white lilly of the valley type of flower, red berries. The flavor comes from the berries. 6 inches in height (1)

You may know is as:


  • Aromatic wintergreen
  • Boxberry
  • Canada tea
  • Checkerberry
  • Deerberry
  • Ground berry
  • Mountain tea
  • Partridge berry
  • Spice berry
  • Teaberry
  • Wax cluster

Cooking

Parts of the plant are edible. The leaves have a sharp, acerbic, and astringent taste, while the berries are sweet. The berries are used in flavorings. (2)

Wintergreen is a very important plant when it comes to pharmacology. Methyl salicylate makes up to 99% of the constituents in the oil distilled from the leaves. This constituent is where we get all aspirin products. (2)

Unlike many essential oils that can be distilled straight from the plant, wintergreen leaves have to be steeped first. In the water, they undergo a fermentation process. It is only after this decomposition that the oil can develop, and then be distilled. (2)

Interestingly, chemists have found a way to create a similar oil, also called oil of wintergreen, from Betula lenta, or the sweet birch tree. This oil contains up to 98% methyl salicylate and is produced only after maceration. However, this oil is produced from the bark of the tree. (2)

Medical


  • Antitussive (relieves cough)
  • Astringent
  • Carminative (relieves flatulence and abdominal bloating)
  • Diuretic
  • Stimulant

It is an emmenagogue, which stimulates menstruation and is a reason to not use it during pregnancy. It is also a galactogogue and stimulates breast milk flow, but the risk to the child is not worth the risk of using it in this manner. (2)

One milliliter (20 drops) of oil of wintergreen is equivalent to about 1860 mg of aspirin, or almost six regular-strength adult aspirin tablets. (3)

Production of Wintergreen oil

Wintergreen berries, from Gaultheria procumbens, are used medicinally. Native Americans brewed a tea from the leaves to alleviate rheumatic symptoms, headache, fever, sore throat, and various aches and pains. These therapeutic effects likely arose because the primary metabolite of methyl salicylate is salicylic acid, a proven NSAID that is also the metabolite of acetylsalicylic acid, commonly known as aspirin. During the American Revolution, wintergreen leaves were used as a substitute for tea, which was scarce. (3)

The Gaultheria species share the common characteristic of producing oil of wintergreen. Wintergreen oil is a pale yellow or pinkish fluid liquid that is strongly aromatic with a sweet, woody odor (components: methyl salicylate (about 98%), α-pinene, myrcene, delta-3-carene, limonene, 3,7-guaiadiene, and delta-cadinene) that gives such plants a distinctive "medicinal" smell whenever bruised. Salicylate sensitivity is a common adverse reaction to the methyl salicylate in oil of wintergreen; it can produce allergy-like symptoms or asthma. (3)

Wintergreen essential oil is usually obtained by steam distillation of the leaves of the plant following maceration in warm water. Methyl salicylate is not present in the plant until formed by enzymatic action from a glycoside within the leaves as they are macerated in warm water. Oil of wintergreen is also manufactured from some species of birch, but these deciduous trees are not called wintergreens. Spiraea plants also contain methyl salicylate in large amounts and are used similarly to wintergreen. Wintergreen has a strong "minty" odor and flavor; however, the Gaultheria-genus plants are not true mints, which belong to the genus Mentha. (3)

One milliliter (20 drops) of oil of wintergreen is equivalent to about 1860 mg of aspirin, or almost six regular-strength adult aspirin tablets. (3)

Wintergreen Mint

Mentha wintergreen
Perennial
USDA Hardiness zones 6 - 11

Mentha Spicata (spearmint ‘wintergreen’)
USDA Hardiness zones 6-7
Companion Plants: Tomato, Cabbage, Thyme

References



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