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Botanical Name : Betula kenaica
Species: B. kenaica
Synonyms: Betula papyrifera kenaica (W.H.Evans.)Henry
Common Names: Kenai birch
Betula kenaica is a deciduous Tree growing up to 12 m (39 ft) tall, with reddish-brown bark that may become pink or grayish-white. The leaf blades are ovate and grow in 2-6 pairs which are 4–5 cm (1.6–2.0 in) (sometimes up to 7.5 cm (3.0 in)) long and 2.5–4.5 cm (0.98–1.77 in) wide. The leaf margins are cuneated and serrated with rounded base and acute apex. The flowers bloom in late spring while fruits fall in autumn.
The flowers are monoecious (individual flowers are either male or female, but both sexes can be found on the same plant) and are pollinated by Wind.
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Suitable for: light (sandy), medium (loamy) and heavy (clay) soils, prefers well-drained soil and can grow in heavy clay and nutritionally poor soils. Suitable pH: acid, neutral and basic (alkaline) soils. It can grow in semi-shade (light woodland) or no shade. It prefers moist soil.
Succeeds in a well-drained loamy soil in a sunny position. Tolerates most soils including poor soils and heavy clays. Fairly wind tolerant. A fast-growing but short-lived species. Hybridizes freely with other members of this genus. A good plant to grow near the compost heap, aiding the fermentation process. This plant is closely related to B. papyrifera, and possibly no more than a sub-species of that species. Trees are notably susceptible to honey fungus.
Seed – best sown as soon as it is ripe in a light position in a cold frame. Only just cover the seed and place the pot in a sunny position. Spring sown seed should be surface sown in a sunny position in a cold frame. If the germination is poor, raising the temperature by covering the seed with glass can help. When they are large enough to handle, prick the seedlings out into individual pots and grow them on in a cold frame for at least their first winter. Plant them out into their permanent positions in late spring or early summer, after the last expected frosts. If you have sufficient seed, it can be sown in an outdoor seedbed, either as soon as it is ripe or in the early spring – do not cover the spring sown seed. Grow the plants on in the seedbed for 2 years before planting them out into their permanent positions in the winter.
The buds and twigs of the plant are used as a stew flavor while its inner bark can be eaten either raw or cooked and can be used as soup thickener. The sap is used to make honey.
Young leaves and catkins are eaten raw. Inner bark – raw or cooked. Best in spring. Inner bark can be dried and ground into a powder and then used as a thickener in soups etc or added to flour when making bread, biscuits etc. Inner bark is generally only seen as a famine food, used when other forms of starch are not available or are in short supply. Sap is eaten raw or cooked. It can be used as a refreshing drink, or can be concentrated by boiling to make a syrup. It is tapped in late winter, the flow is best on sunny days following a heavy frost. The sap can be fermented into a beer. An old English recipe for the beer is as follows:- “To every Gallon of Birch-water put a quart of Honey, well stirr’d together; then boil it almost an hour with a few Cloves, and a little Limon-peel, keeping it well scumm’d. When it is sufficiently boil’d, and become cold, add to it three or four Spoonfuls of good Ale to make it work…and when the Test begins to settle, bottle it up . . . it is gentle, and very harmless in operation within the body, and exceedingly sharpens the Appetite, being drunk ante pastum.”
Medicinal Uses: The bark is antirheumatic, astringent, lithontripic, salve and sedative. An infusion of the plant is used as a hair conditioner and dandruff treatment.
Other Uses: Wood – close-grained, light, strong, hard, tough. It makes a good fuel, whilst the bark makes a good kindling.
Disclaimer : The information presented herein is intended for educational purposes only. Individual results may vary, and before using any supplement, it is always advisable to consult with your own health care provider.