Blueleaf birch

  • Latin name: Betula xcaerulea Blanch. (pro sp.)
  • French name: Bouleau bleu
  • Taxonomic Serial Number: 19483
    195210 [syn. B. ×caerulea-grandis Blanch.]
Description

Leaves

  • Leaf - blueleaf birch

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

  • Lateral bud and leaf scar - blueleaf birch

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

  • Fruit scale (left); winged nutlet (right) - blueleaf birch

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

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