Birch Oil


Birch Oil - Directory & Reference Resources

Birch-From Wikipedia, the free encyclopedia

For other uses, see Birch (disambiguation).

Birches

Silver Birch

Scientific classification

Kingdom: Plantae

Division: Magnoliophyta

Class: Magnoliopsida

Order: Fagales

Family: Betulaceae

Genus: Betula

L.

Species

Many species;

see text and classification

Birch is the name of any tree of the genus Betula, in the family Betulaceae, closely related to the beech/oak family, Fagaceae. These are generally small to medium-size trees or shrubs, mostly of northern temperate climates. The simple leaves may be toothed or lobed. The fruit is a small samara, although the wings may be obscure in some species. They differ from the alders (Alnus, the other genus in the family) in that the female catkins are not woody and disintegrate at maturity, falling apart to release the seeds, unlike the woody cone-like female alder catkins.

The common name birch is derived from an old Germanic root similar to birka. The Proto-Germanic rune berkanan is named after the birch. The botanic name Betula is from the original Latin.

Birch is used as a food plant by the larvae of a large number of Lepidoptera species, see List of Lepidoptera which feed on Birches.

The birch is considered a national tree of Russia, where it used to be worshipped as a goddess during the Green Week in early June.

 Species

See also: Betula classification birch

Birches of North America include

Betula alleghaniensis - Yellow Birch (B. lutea)

Betula cordifolia - Mountain Paper Birch

Betula glandulosa - American Dwarf Birch

Betula lenta - Sweet Birch, Cherry Birch, or Black Birch

Betula lenta subsp. uber - Virginia Round-Leaf Birch (endemic, Cressy Creek, Smyth County, Virginia)

Betula michauxii - Newfoundland Dwarf Birch

Betula nana - Dwarf Birch or Bog Birch (also in northern Europe and Asia)

Betula neoalaskana - Alaska Birch or Yukon Birch

Betula nigra - River Birch or Black Birch

Betula occidentalis - Water Birch or Red Birch (B. fontinalis)

Betula papyrifera - Paper Birch, Canoe Birch or American White Birch

Betula populifolia - Gray Birch

Betula pumila - Swamp Birch

Birches of Europe and Asia include

Betula albosinensis - Chinese Red Birch

Betula albosinensis var. septentrionalis - North Chinese Red Birch

Betula alnoides - Alder-leaf Birch

Betula austrosinensis - South China Birch

Betula chinensis - Chinese Dwarf Birch

Betula ermanii - Erman's Birch

Betula grossa - Japanese Cherry Birch

Betula jacquemontii (Betula utilis subsp. jacquemontii) - White-barked Himalayan Birch

Betula mandschurica - Manchurian Birch

Betula mandschurica var. japonica - Japanese Birch

Betula maximowiczii - Monarch Birch

Betula medwediewii - Caucasian Birch

Betula nana - Dwarf Birch (also in northern North America)

Betula pendula - Silver Birch

Betula platyphylla (Betula pendula var. platyphylla) - Siberian Silver Birch

Betula pubescens - Downy Birch, White Birch or European White Birch (also in northern Asia)

Betula pubescens subsp. tortuosa - Arctic White Birch (subarctic Eurasia, Greenland)

Betula szechuanica (Betula pendula var. szechuanica) - Sichuan Birch

Betula utilis - Himalayan Birch

Note: many American texts have B. pendula and B. pubescens confused, though they are distinct species with different chromosome numbers

 Uses

Birches are versatile trees. The sap, bark, leaves, wood, twigs, and roots are used for food, construction materials, drums, medicinal treatments, lubricants, and other practical applications.

Due to birch pulp’s short-fibre qualities, this hardwood can be used to make printing paper.

In northern latitudes birch is however considered to be the most important allergenic tree pollen, with an estimated 15-20% of hay fever sufferers sensitive to birch pollen grains.

Extracts of birch are used for flavoring or leather oil, and in cosmetics such as soap or shampoo. In the past, commercial oil of wintergreen (methyl salicylate) was made from the Sweet Birch (Betula lenta). Birch tar or Russian Oil, extracted from birch bark, was used as a lubricant or glue and also for medicinal purposes. Xylitol can also be extracted from birch, a sugar alcohol artificial sweetener, which has shown effectiveness in preventing, and in some cases repairing, tooth decay.

In Belarus, Russia, the Baltic States, Finland, and parts of northern China, birch sap is drunk as a refreshing beverage, and is believed to have tonic qualities. It is watery and pale green in color, with a slightly sweet flavor, and is bottled commercially. Birch sap may also made into kvass. The sap of particular birch species may also be rendered into birch syrup, vinegar, beer, soft drinks, and other foods. In contrast to maple syrup, birch syrup is very difficult to produce, making it more expensive than other food syrups. It is also considerably less sweet than maple syrup and the sap for syrup production is not available until a month later than maple's. The syrup is made mainly in Alaska (from Alaska Birch) and Russia (from several species), and more rarely elsewhere.

Silver Birch (Betula pendula) is Finland's national tree. Occasionally one uses leafy, fragrant twigs of silver birch to gently beat oneself in a sauna. The twigs are called vihta or vasta. This has a relaxing effect on the muscles.

Birch is used as firewood due to its high calorific value per unit weight and unit volume.

Birch leaves are used to make a diuretic tea and to make extracts for dyes and cosmetics.

Birch twigs were bound in a bundle, also called birch, to be used for birching, a form of corporal punishment.

The chaga mushroom is an adaptogen that grows on white birch trees, extracting the birch constituents and is used as a remedy for cancer.

The bark is high in betulin and betulinic acid, phytochemicals which have potential as pharmaceuticals, and other chemicals which show promise as industrial lubricants.

Many of the First Nations of North America prized the birch for its bark, which due to its light weight, flexibility, and the ease with which it could be stripped from fallen trees, was often used for the construction of strong, waterproof but lightweight canoes, bowls, and tipis.

Birch bark can be soaked until moist in hot water, and then formed into a cast for a broken arm[citation needed]. It is also used in starting fires. The bark will burn very well, even when wet, because of the oils it contains. With care, the bark can be split into very thin sheets that will ignite from even the smallest of sparks.

Birches also have spiritual importance in several religions, both modern and historical.

Birch wood is also used to make drums. They produce boosted high and low frequencies with loud low end punch that is ideal for studio recordings.

According to the Food Network series Unwrapped, birch is a preferred wood for the manufacture of toothpicks.

 The inner bark of birch can be ingested.

 References

Wikimedia Commons has media related to:

BetulaFlora of North America: Betula

Flora of China: Betula

The Monday Garden: Birches

Birch tree (foreground), showing characteristic white bark

Closeup of Silver Birch bark

A gnarled Silver Birch bark

A betula nana or tortuosa at Kvaløya

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