Narrowleaf cottonwood

Silhouette - narrowleaf cottonwood
  • Latin name: Populus angustifolia James
  • French name: Peuplier à feuilles étroites
  • Synonym(s): Narrowleaf balsam poplar
  • Taxonomic Serial Number: 22452
Description

Leaves

  • Leaf with detail of finely toothed margin - narrowleaf cottonwood

Form

  • Narrow and willow-like
  • Widest near or below the middle
  • Narrowed to a wedge-shaped base

Length

  • 5–9 cm

Colour

  • Upper surface light yellowish-green
  • Lower surface slightly paler and often resin-stained

Margin

  • Finely toothed to the tip

Petiole

  • Stiff, hairless
  • Glandless
  • Very short
  • Almost circular in cross-section, but flattened near the base of the blade

Buds

  • Lateral bud and leaf scar - narrowleaf cottonwood

Form

  • Terminal bud long-pointed
  • Shiny, resinous
  • Lateral buds slightly smaller, diverging from the twig, with 5 scales

Length

  • 6–12 mm

Colour

  • Brownish

Twigs

  • Winter twig - narrowleaf cottonwood

Form

  • Slender

Colour

  • Yellowish-brown becoming a bright whitish or ivory by the 2nd year

Flowers

Structure

  • Dioecious

Fruits

  • Fruit capsule, open - narrowleaf cottonwood

Form

  • Capsules broadly ovate, tip short
  • Hairless
  • Splitting into 2 parts when mature

Length

  • Mature seed catkins 6–8 cm
  • Capsules 6–8 mm

Bark

Form

  • Smooth, becoming furrowed at the base of mature trunks

Colour

  • Whitish or yellowish-green

Size

Height

  • To 15 m

Diameter

  • To 30 cm

Tree form

  • Silhouette - narrowleaf cottonwood

Forest-grown

Crown

  • Narrowly conical with ascending slender branches and the appearance of a willow

 

Habitat

Site

  • One of the first plants to become established on new sandbars

Range

Uncommon in Canada; southwestern Saskatchewan and adjacent Alberta

Insects and diseases

Insects and diseases that are found most frequently and/or that cause the most damage in our Canadian forests.

Distribution map
Distribution map - narrowleaf cottonwood
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