blueleaf birch
- Latin name: Betula xcaerulea Blanch. (pro sp.)
- French name: Bouleau bleu
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Taxonomic Serial Number: 19483
195210 [syn. B. ×caerulea-grandis Blanch.]
Description
Leaves
Form
- Tip long-pointed
- Base variable
- Some hairs in the vein axils on lower surface
- 8 veins
Length
- 5–9 cm
Colour
- Upper surface bluish-green
- Lower surface lighter bluish-green
Margin
- 38–50 teeth per side
Buds
Form
- Ovoid, sharp-pointed
- Bud scales fringed with hairs
Length
- 6 mm
Colour
- Brownish
Twigs
Form
- Smooth, hairless
- Often glandular
Flowers
Form
- Pollen catkins in small clusters of 1–3
Length
- Mature seed catkins 2.5–3.5 cm
Structure
- Monoecious
Fruits
Form
- Middle lobe of fruit scales shorter than lateral lobes
- Lateral lobes diverging
Length
- Nutlets 2.5–3.5 mm
- Stigmas 1.2–1.6 mm
- Fruit scales 4–7 mm
Width
- Nutlets narrow, 1.2 mm
- Wings wider than the nutlet
Bark
Form
- Separable, peeling easily
Colour
- White
Size
Height
- To 35 m
Habitat
Associated species
- Often found with red spruce
Range
Labrador, the Gaspé Peninsula, and Nova Scotia, south into northern New England and New York
Insects and mites
Insects that cause damage to this tree.
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Birch leafminer
Scientific name: Fenusa pusilla (Lepeletier)
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Late birch leaf edgeminer
Scientific name: Heterarthrus nemoratus (Fallen)
Foliage or buds
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Birch leafminer
Scientific name: Fenusa pusilla (Lepeletier)
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Ceanothus silk moth
Scientific name: Hyalophora euryalis (Walker)
- Eupithecia subfuscata (Haworth)
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Late birch leaf edgeminer
Scientific name: Heterarthrus nemoratus (Fallen)
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Speckled green fruitworm
Scientific name: Orthosia hibisci (Guenée)
Roots, bark, stem or trunk, or branches
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