American Mountain Ash
Sorbus americana · Rosaceae (Rose family)
AI-generated identification · may be incorrect
Leaf Morphology
Leaf Type
Pinnately compound, deciduous leaf consisting of multiple leaflets arranged along a central rachis
Shape
Lanceolate to oblong leaflets with acute to rounded tips and rounded bases
Margin
Serrate (sharply toothed) along the entire edge of the leaflets
Arrangement
Alternate arrangement of compound leaves along the woody stem, with leaflets arranged oppositely or sub-oppositely along the central rachis
Venation
Pinnate venation on each individual leaflet, featuring a prominent central midrib and evenly spaced lateral veins branching outward
Key Features
Pinnately compound leaves with 11-17 sharply toothed leaflets, smooth grey bark, buds that are often sticky or gummy, and bright red pome fruits clustered at branch tips
Description
A small deciduous tree or large shrub known for its attractive compound foliage, flattened clusters of small white flowers in spring, and showy clusters of bright red-orange berries that persist into winter, providing a vibrant contrast against greyish, smooth bark
Habitat
Found primarily in cool, moist, mountainous forests, rocky woods, bog borders, and disturbed soils at higher elevations or northern latitudes
Native Range
Native to northeastern North America, ranging from Newfoundland west to Manitoba, and south through the northern United States and along the Appalachian Mountains