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Woody > Betula > Betula nigra > Betula nigra

Betula nigra


River Birch




Origin:  United States of America.
Family
Betulaceae
Genus
Betula
Species
nigra
Category
Woody
Type
Tree (deciduous)
Pronunciation
USDA Hardiness Zone
3b - 9
Canadian Hardiness Zone
3
RHS Hardiness Zone
H7
Temperature (°C)
-34 - (-40)
Temperature (°F)
-30 - (-40)
Height
12 - 21 m
Spread
9 - 15 m
Photographs
Description and Growing Information
Flowering Period
May
General Description
An unusual tree with its distinct exfoliating bark, often seen as a multi stemmed tree. This tree has been placed on the IUCN Red List as least concern.
Landscape
Estates, parks, golf courses and campuses.
Cultivation
Plant in full sun to partial shade in moist, well-draining slightly acidic soil.
Shape
Pyramidal to oval in youth. More rounded towards maturity.
Growth
Medium
ID Characteristic
Brown to deep beige, more vertical exfoliating bark. Uniform exfoliation over the main trunk.
Pests
Leaf spot (cosmetic).
Bark/Stem Description
Branches 5 cm or greater exfoliate darker revealing a richer colour underneath. Colours vary and are never true to one, shades of gun metal grey, tawny brown, cinnamon to all of the above mixed together.
Flower/Leaf Bud Description
Imbricate, small, light chestnut brown.
Leaf Description
Alternate, sharp pointed. Dark green in summer turning yellow in autumn. Leaves drop fast.
Flower Description
Long, slender male catkins dark brown in colour that grow to 7.5 cm in length.
Fruit Description
Small nutlets in 25 mm catkins that ripen and shed in the spring.
Colour Description
Lustrous green foliage in summer turning yellow in the autumn.
Texture Description
Medium.
Notable Specimens
The A. M (Mac) Cuddy Gardens, Strathroy, Ontario, Canada.
Propagation
Softwood cuttings.
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