Betula lenta L.

Sweet birch (en)

Species

Angiosperms > Fagales > Betulaceae > Betula

Characteristics

Tree to 25 m, the smooth, reddish-brown bark exfoliating in thin layers, eventually becoming rough, with large, thickened, loose-edged plates on large trees; crushed twigs with a strong flavor of wintergreen; lvs ovate or ovate-oblong, 5–10 cm, acute or short-acuminate, very finely and sharply serrate, rounded to subcordate at base, appressed-villous on the veins beneath; lateral veins 9–12 pairs, impressed above; fruiting catkins sessile or nearly so, short-cylindric to ellipsoid or somewhat obovoid,2–3 cm; scales glabrous, 5–7 mm, the middle lobe somewhat prolonged, the oblong lateral lobes divergent or ascending; frs broadly triangular-obovoid, 2.4–3 mm and about as wide, the body half as wide; 2n=28. Moist woods; s. Me. and s. Que. to Del., O., and Ky., and in the mts. to Ga. and Ala. (B. uber (Ashe) Fernald, a striking variant in Smyth Co., Va., with rounded lvs 2–4 cm, and 3–6 pairs of lateral veins)
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A deciduous tree. It grows 15 m tall and spreads 12 m wide. It can be 20-25 m high. The bark is red-brown with pale lenticels across is. The bark becomes dark and furrowed. The leaves are oval and 12 cm long by 6 cm wide. They taper to the tip and have sharp teeth. They are glossy and dark green above and paler with silky hairs underneath. They turn yellow in autumn. The buds are mostly without hairs. The male and female flowers are in separate catkins. Male ones are 7.5 cm long and yellow and drooping. The female ones are green and upright. They occur separately on the same plant. The fruit is a catkin which breaks up when ripe.
Life form perennial
Growth form tree
Growth support free-standing
Foliage retention deciduous
Sexuality monoecy
Pollination anemogamy
Spread -
Mature width (meter) 7.0
Mature height (meter) 16.65 - 21.15
Root system -
Rooting depth (meter) 0.7
Root diameter (meter) 0.2
Flower color
Blooming months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Fruit color
Fruiting months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Nitrogen fixer -
Photosynthetic pathway c3

Environment

It is a temperate plant. It is native to North America. It grows in moist woods and the altitude decreases with distance from the equator. It is resistant to drought and frost. It suits hardiness zones 3-9. Arboretum Tasmania.
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Rich woodlands, preferring north-facing slopes and moist soils. It is also found on rocky soils. Rich, moist, cool forests, especially on protected slopes, to rockier, more exposed sites; at elevations up to 1,500 metres.
Light 5-8
Soil humidity 4-6
Soil texture 2-5
Soil acidity 1-7
Soil nutriment -
Hardiness (USDA) 4-7

Usage

The inner bark is eaten fresh or dried for later use. It is also used for tea. The leaves and twigs have an oil and they are used to brew a tea. The leaves are dried and used for tea. The sap is also drunk. It can also be converted into vinegar. It is fermented into beer. An essential oil distilled from the twigs and bark is used as a wintergreen flavouring in soft drinks and desserts and puddings.
Uses beverage essential oil fiber food fuel material medicinal tea timber wood
Edible barks leaves roots saps
Therapeutic use Gastrointestinal Aid (bark), Urinary Aid (bark), Antidiarrheal (bark), Pulmonary Aid (bark), Tonic (bark), Antidiarrheal (leaf), Unspecified (unspecified), Cold Remedy (unspecified), Blood Medicine (unspecified), Febrifuge (unspecified), Gynecological Aid (unspecified), Orthopedic Aid (unspecified), Stimulant (unspecified), Anodyne (unspecified), Burn (unspecified), Chafe (unspecified), Dandruff (unspecified), Depurative (unspecified), Gout (unspecified), Medicine (unspecified), Parasiticide (unspecified), Rheumatism (unspecified), Scald (unspecified), Sciatica (unspecified), Skin (unspecified), Sugar (unspecified), Tea (unspecified), Wound (unspecified), Diuretic (unspecified)
Human toxicity -
Animal toxicity -

Cultivation

Plants can be grown from seed. Plants can be grafted.
Mode cuttings graftings seedlings
Germination duration (days) 30 - 90
Germination temperacture (C°) 11 - 13
Germination luminosity -
Germination treatment stratification
Minimum temperature (C°) -35
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Images

Habit

Betula lenta habit picture by Maarten Vanhove (cc-by-sa)

Leaf

Betula lenta leaf picture by Jesse Corriveau (cc-by-sa)
Betula lenta leaf picture by j sid (cc-by-sa)

Distribution

Betula lenta world distribution map, present in Åland Islands, Canada, Georgia, Malaysia, Nicaragua, and United States of America

Conservation status

Betula lenta threat status: Least Concern

Identifiers

LSID urn:lsid:ipni.org:names:295125-1
WFO ID wfo-0000334091
COL ID 68K9V
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR) Link

Synonyms

Betula excelsa Betula humilis Betula lenta subsp. lenta Betula lenta var. persicifolia Betula lenta

Lower taxons

Betula lenta subsp. uber