Details of...
Scientific Name: Sorbus americana
Pronunciation: SORE-bus uh-mair-ih-KAY-nuh
Common Name: American mountain ash
Family Name: Rosaceae
Plant Type: Shrub - deciduous, Tree - deciduous
Key ID Features: Leaves pinnately compound; flowers white; fruit red, clustered.
Course(s): not used (on campus)

Habit: Twiggy, Upright
Form: Oval - vertical, Round
Texture: Medium - fine
Mature Size:
Height:7 - 10m
Spread:7 - 10m
Growth Rate:Moderate
Origin: Canada - eastern, U.S. - northeast
Hardiness Rating: Zone 3: (-40 to -34 C)
Exposure: Full sun
Soil/ Growing Medium: Rocky or gravelly or dry
Water Use: Wetlands
Landscape Uses: Screening, Shade tree, Summer interest, Tall background, Wildlife food, Woodland margin
Additional Info: Google
American mountain ash
Leaf Morphology: Glossary
Form: Compound
Arrangement: Alternate
Texture/ Venation: Pinnate venation, Soft flexible
Surfaces: Distinctive smell
Compound Leaf: Odd-pinnate
Leaf(let) Terms:
Shapes: Lanceolate
Margins: Serrate

Inflorescence Type: Floriferous, Cyme
Flower Morphology:
Number of Petals:5
Corolla Shape:Rotate/stellate
Colour (petals): Showy, White
Flower Scent: Unpleasant
Flower Time at Peak: May, Jun

Fruit Type: Pome
Fruit Colour: Orange, Red
Fruiting Time: Aug
Additional Info: Showy

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

Propagation: Seed
Pest Susceptibility: Anthracnose, Blight or needle cast, Mites,
(BHE) Boulevard by Hwy. 10 Eastend : confirm ID
(FSC) Far South Campus : confirm ID
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