American mountain-ash

Silhouette - American mountain-ash
  • Latin name: Sorbus americana Marsh.
  • French name: Sorbier d'Amérique
  • Synonym(s): Dogberry
  • Taxonomic Serial Number: 25319
Description

Leaves

  • Leaf - American mountain-ash

Form

  • Leaflets lance-shaped
  • Taper-pointed, thin
  • Lower surface hairless
  • Narrower than showy mountain-ash

Length

  • Leaflets 5–8 cm

Colour

  • Upper surface light green
  • Lower surface paler

Buds

Form

  • Scales mostly hairless

Flowers

Form

  • In dense, flattish clusters (corymbs)
  • Petals broadest toward the tip
  • Stalks hairless

Length

  • 3–4 mm

Structure

  • Synoecious

Floral timing

  • May and June
  • About 1 week earlier than showy mountain-ash

Fruits

  • Fruit - American mountain-ash

Form

  • Maturing in August
  • Flesh thin

Width

  • 4–6 mm

Colour

  • Bright coral-red

Structure

  • Pome

Size

Height

  • Up to 10 m

Tree form

  • Silhouette - American mountain-ash

Forest-grown

Trunk

  • Short, with spreading slender branches

Crown

  • Narrow, open
  • Round-topped

Habitat

Site

  • Moist sites bordering swamps
  • Rocky hillsides
  • Dry soils
Insects and diseases

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

Photos
  • American mountain-ash
  • American mountain-ash
  • American mountain-ash
  • American mountain-ash
Distribution map
Distribution map - American mountain-ash
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