Mountain alder

  • Latin name: Alnus incana ssp. tenuifolia (Nutt.) Breit.
  • French name: Aulne à feuilles minces
  • Synonym(s): Thinleaf alder
  • Taxonomic Serial Number: 181889
    19477 [syn. A. tenuifolia Nutt.]
Description

Leaves

  • Leaf - mountain alder

Form

  • Thinner and smoother than speckled alder
  • Veins not impressed into the upper surface

Buds

  • Lateral bud and leaf scar - mountain alder

Form

  • Fine hairs

Colour

  • Bright red

Twigs

Form

  • Slender, hairy

Colour

  • Light green

Flowers

Form

  • Mature seed catkins in groups of 2–5 on slender stalks

Length

  • 9–13 mm

Structure

  • Monoecious

Bark

Form

  • Not as conspicuously marked with lenticels as speckled alder
  • With age becoming scaly

Colour

  • Grey or reddish-grey

Size

Height

  • To 10 m

Habitat

Site

  • Stream banks
Insects and diseases

Insects

Diseases

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

Distribution map
Distribution map - mountain alder
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