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Showy mountain-ash

Silhouette - showy mountain-ash
  • Latin name: Sorbus decora (Sarg.) C.K. Schneid.
  • French name: Sorbier décoratif
  • Synonym(s): Dogberry
  • Taxonomic Serial Number: 25322
Description

Leaves

  • Leaf - showy mountain-ash
  • Leaflet with detail of finely toothed margin - showy mountain-ash

Form

  • 13–17 leaflets
  • Narrowly elliptic
  • Scarcely tapered
  • Blunt-pointed, firm
  • Slightly hairy when young

Length

  • Leaflets 3–8 cm
  • Leaf and central stalk about 20 cm

Colour

  • Upper surface blue-green
  • Lower surface paler

Margin

  • Finely toothed from the tip to the middle or just below

Buds

  • Lateral bud and leaf scar - showy mountain-ash

Form

  • Terminal bud narrowly cone-shaped
  • Sharp-tipped often with a curve
  • Shiny, sticky
  • Outer scales hairless
  • Inner scales hairy

Length

  • 10–14 mm

Colour

  • Dark reddish-brown

Twigs

  • Winter twig - showy mountain-ash

Form

  • Skin that weathers off
  • Hairless

Colour

  • Reddish-brown to greyish

Flowers

Form

  • Petals round
  • Flowers on short, stout, hairy stalks
  • In dense, many-flowered, open clusters (corymbs)

Length

  • Petals 4–5 mm

Structure

  • Synoecious

Floral timing

  • May and June
  • A week or so later than American mountain-ash

Fruits

  • Fruit - showy mountain-ash

Form

  • Shiny
  • In many-fruited, rounded clusters
  • Flesh thick

Width

  • 8–10 mm

Colour

  • Red

Structure

  • Pome

Timing

  • Fruits mature in August and September

Bark

Form

  • Smooth, thin, with age becoming slightly scaly

Colour

  • Light greyish-green to golden-brown

Size

Height

  • To 15 m

Diameter

  • To 25 cm

Tree form

  • Silhouette - showy mountain-ash

Forest-grown

Trunk

  • Straight, branch-free

Crown

  • Short, rounded

Habitat

Site

  • Rocky shores of rivers and lakes
Photos

Photos

Insects and mites

Insects that cause damage to this tree.

Roots, bark, stem or trunk, or branches

Western ash bark beetle

Scientific name: Hylesinus californicus [Swaine]

Distribution map
Distribution map - showy mountain-ash