Details of...
Scientific Name: Sorbus aucuparia
Pronunciation: SORE-bus awk-yoo-PAR-ee-uh
Common Name: European mountain ash
Family Name: Rosaceae
Plant Type: Invasive plant, Tree - deciduous
Key ID Features: Small deciduous tree 5-15 m tall; bark with horizontal pattern; leaves pinnately compound, up to 20 cm long, (9-)13-17(-19) leaflets oblong-lanceolate, sharp pointed, serrated almost to base, red rachis, mid- to dark green with grey-green undersides, 2-6 cm long; florets >75 per flat-topped corymb each about 13 cm wide. Winter ID: buds large, densely covered with gray soft hairy (resemble pussy willows); fruit persistent, bright red-scarlet to orange pomes 9-11 mm wide. [mainly from E-Flora BC]
Course(s): AARB 1012, HORT 1155, CLT Training

Habit: Stiffly upright
Form: Oval - vertical
Texture: Medium - coarse
Mature Size:
Height:10 - 15m
Spread:5 - 7m
Growth Rate:Moderate
Origin: Europe
Hardiness Rating: Zone 3: (-40 to -34 C)
Exposure: Full sun
Soil/ Growing Medium: Acidic, Well-drained
Water Use: Low, Moderate
Landscape Uses: Fall interest, Medicinal plant, Specimen plant, Tall background
Additional Info: Google. Compare to S. decora.
European mountain ash
Leaf Morphology: Glossary
Form: Compound
Arrangement: Alternate
Texture/ Venation: Soft flexible
Surfaces: Glabrous, Lustrous
Compound Leaf: Odd-pinnate
Colour in Fall: Yellow, Orange
Leaf(let) Terms:
Shapes: Lanceolate, Oblong
Apices: Acute
Bases: Obtuse
Margins: Double serrate, Serrate

Inflorescence Type: Floriferous, Corymb
Flower Morphology:
Number of Petals:5
Corolla Shape:Rotate/stellate
Colour (petals): Showy, White
Flower Scent: None, Musky
Flower Time at Peak: Mar, Apr

Fruit Type: Pome
Fruit Colour: Orange, Red
Fruiting Time: Sep, Oct
Additional Info: Showy, Edible, Persistent, bitter

Bark Morphology: Smooth, Prominent lenticels
Bark or Stem Colour: Grey
Leaf Bud Type: Ovoid
Leaf Scar Shape:Crescent shaped
Organ Modifications: Stipule, leafy

Propagation: Seed, Greenwood cuttings
Pest Susceptibility: Anthracnose, Scale insects,
(FSC) Far South Campus : confirm ID
(TFL) Turf Field Lab
(TFLS) Turf Field Lab South
Location Map

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