Betula pubescens Ehrh.

Mountain birch (en), Bouleau pubescent (fr), Bouleau blanc (fr)

Species

Angiosperms > Fagales > Betulaceae > Betula

Characteristics

Trees and shrubs ; trunks 1--many. Bark when young dark reddish brown, in maturity light reddish brown to tan or brownish or grayish white, smooth, rather close or readily exfoliating in paper-thin sheets; lenticels pale, horizontal, in maturity dark, horizontally expanded. Twigs without taste and odor of wintergreen, usually covered with short bristly hairs. Leaf blade ovate or rhombic-ovate, margins serrate, apex acute; surfaces abaxially sparsely pubescent to velutinous, especially along major veins and in vein axils, without prominent resinous glands. Fruiting catkins pendulous or subpendulous, cylindric, shattering with fruits in late fall; scales puberulent to glabrous, often ciliate, lobes diverging at middle. Samaras with wings equal to or somewhat broader than body, broadest near summit, extended beyond body apically.
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A tree which loses its leaves during the year. It grows to 24 m high. It spreads 9 m wide. The bark is cream brown. There is fine down on the young twigs. The branches are twisting and do not hang down. The crown is rounded. The leaves are triangular shaped and have an irregular edge. They are 6 cm long and 5 cm across. The leaf stalk is slender and hairy. The female catkins are smaller and more erect than the male catkins. The male catkins are 6 cm long and yellow.
Life form perennial
Growth form tree
Growth support free-standing
Foliage retention deciduous
Sexuality monoecy
Pollination anemogamy
Spread anemochory
Mature width (meter) 9.0
Mature height (meter) 20.0
Root system -
Rooting depth (meter) -
Root diameter (meter) -
Flower color
Blooming months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Fruit color
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway c3

Environment

It is a temperate plant. It can tolerate more poorly drained soil. It grows in wetter soils and damp uplands. It is frost resistant. It is damaged by drought. Hobart Botanical Gardens. It suits hardiness zones 2-9. Arboretum Tasmania.
More
Open woodland and heaths, usually on acid soils, to 830 metres. Mixed woodlands, floodplains, as successional habitat on fens, mires and bogs, by streams and hill-side flushes, peaty hollows, roadsides and field boundaries.
Light 5-9
Soil humidity 3-9
Soil texture 1-5
Soil acidity 3-7
Soil nutriment -
Hardiness (USDA) 1-6

Usage

The sap is rich in sugar. It can be tapped in spring and made into birch wine by adding honey. The buds are used as flavouring in drinks.
Uses charcoal dye environmental use essential oil fiber material medicinal tea timber wood
Edible barks flowers leaves saps
Therapeutic use -
Human toxicity -
Animal toxicity -

Cultivation

Plants are grown from seed. Seed germinate easily.
Mode cuttings graftings seedlings
Germination duration (days) 30 - 90
Germination temperacture (C°) 20 - 22
Germination luminosity light
Germination treatment stratification
Minimum temperature (C°) -45
Optimum temperature (C°) 10 - 18
Size -
Vigor -
Productivity -

Images

Habit

Betula pubescens habit picture by ALAIN BIEVELEZ (cc-by-sa)
Betula pubescens habit picture by Caw Vus (cc-by-sa)
Betula pubescens habit picture by Partanen Asta (cc-by-sa)

Leaf

Betula pubescens leaf picture by Joan Francesc (cc-by-sa)
Betula pubescens leaf picture by Paweł Portała (cc-by-sa)
Betula pubescens leaf picture by Lamazares Rodríguez Manuel (cc-by-sa)

Flower

Betula pubescens flower picture by ar lima (cc-by-sa)
Betula pubescens flower picture by Kampf Robert (cc-by-sa)
Betula pubescens flower picture by Sabina Hartmann (cc-by-sa)

Fruit

Betula pubescens fruit picture by Sonja Bajic (cc-by-sa)
Betula pubescens fruit picture by jobard88 (cc-by-sa)
Betula pubescens fruit picture by Rachel Burton (cc-by-sa)

Distribution

Betula pubescens world distribution map, present in Austria, Belarus, Switzerland, Czech Republic, Germany, Denmark, Spain, Finland, France, United Kingdom of Great Britain and Northern Ireland, Hungary, Ireland, Iran (Islamic Republic of), Iceland, Italy, Malaysia, Netherlands, Norway, Poland, Portugal, Romania, Russian Federation, Sweden, Turks and Caicos Islands, Ukraine, and United States of America

Conservation status

Betula pubescens threat status: Least Concern

Identifiers

LSID urn:lsid:ipni.org:names:295185-1
WFO ID wfo-0000335985
COL ID LPDF
BDTFX ID 82088
INPN ID 85904
Wikipedia (EN) Link
Wikipedia (FR) Link

Synonyms

Betula concinna Betula friesii Betula laciniata Betula pubescens Betula lucida Betula pubescens f. pendula Betula alba var. friesii Betula alba var. hornemannii Betula alba var. ovata Betula alba var. pubescens Betula alba subsp. pubescens Betula alba var. vulgaris Betula pubescens var. cryptocarpa Betula pubescens var. media Betula pubescens var. palmiformis Betula pubescens subsp. callosa Betula pubescens subsp. concinna Betula pubescens var. glabra Betula pubescens subsp. nigricans Betula pubescens var. ovalifolia Betula pubescens var. sibakademica Betula pubescens subsp. subarctica Betula pubescens subsp. suecica Betula pubescens var. vestita Betula pubescens var. rustica Betula pubescens var. silvatica Betula pubescens var. silvestris Betula pubescens var. subaequalis Betula pubescens var. subalpina Betula pubescens var. megalocarpa Betula pubescens var. nigricans Betula pubescens var. friesii Betula pubescens var. lucida Betula pubescens subsp. ovalifolia Betula friesii var. subalpina Betula friesii var. oxyodontia Betula alba f. hornemannii Betula odorata var. alpigena Betula pubescens var. oblongifolia Betula alba var. lupulina

Lower taxons

Betula pubescens var. glabrata Betula pubescens var. pubescens Betula pubescens var. pumila Betula pubescens var. golitsinii Betula pubescens var. litwinowii Betula pubescens var. fragrans Betula pubescens