American mountain-ash
- Latin name: Sorbus americana Marsh.
- French name: Sorbier d'Amérique
- Synonym(s): Dogberry
- Taxonomic Serial Number: 25319
Description
Leaves
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
Form
- Maturing in August
- Flesh thin
Width
- 4–6 mm
Colour
- Bright coral-red
Structure
- Pome
Size
Height
- Up to 10 m
Tree form
Forest-grown
Trunk
- Short, with spreading slender branches
Crown
- Narrow, open
- Round-topped
Habitat
Site
- Moist sites bordering swamps
- Rocky hillsides
- Dry soils
Photos
Photos
Anthony Scullion
Insects and mites
Insects that cause damage to this tree.
-
Ashflower gall
Scientific name: Eriophyes fraxiniflora Felt
-
Fall cankerworm
Scientific name: Alsophila pometaria [Harris]
-
Galls of hardwoods
Scientific name: Eriophyes sp.
-
Pear Sawfly (Pear slug)
Scientific name: Caliroa cerasi (Linnaeus)
-
Spring cankerworm
Scientific name: Paleacrita vernata (Peck)
Foliage or buds
-
Fall cankerworm
Scientific name: Alsophila pometaria [Harris]
-
Mountain-ash sawfly
Scientific name: Pristiphora geniculata (Hartig.)
-
Pear Sawfly (Pear slug)
Scientific name: Caliroa cerasi (Linnaeus)
-
Spring cankerworm
Scientific name: Paleacrita vernata (Peck)
-
Whitetriangle leafroller
Scientific name: Clepsis persicana (Fitch)
Roots, bark, stem or trunk, or branches
Diseases caused by pathogens
Diseases caused by pathogens that cause damage to this tree.
Flowers, fruits, or seeds
-
Fire blight
Pathogen name: Erwinia amylovora (Burrill) Winslow. et al.
Foliage or buds
-
Fire blight
Pathogen name: Erwinia amylovora (Burrill) Winslow. et al.
Roots, bark, stem or trunk, or branches
Distribution map
