European Ash, Common Ash
Kingdom: Plantae, Division: Tracheophyta, Class: Magnoliopsida, Order: Lamiales, Family: Oleaceae, Genus: Fraxinus, Species: Fraxinus excelsior · Oleaceae (Olive family) · Pinnately compound; Deciduous
Species
Fraxinus excelsior (Confidence: 95%)
Leaf Type
Pinnately compound; Deciduous
Family
Oleaceae (Olive family)
Shape
Leaflets are ovate to elliptic; opposite pairs with a single terminal leaflet
Size
Total leaf length approximately 8-12 inches; individual leaflets around 2-4 inches long and 1-1.5 inches wide
Margin
Serrate (toothed)
Arrangement
Opposite arrangement on the twig
Rarity
Common (though currently threatened in many regions by Ash Dieback)
Color & Pattern
Deep green upper surface, paler green underside; lacks variegation; turns yellow or drops green in autumn
Venation Pattern
Pinnate venation with a distinct central midrib on each leaflet
Texture & Surface
Smooth (glabrous) on the upper surface; may have slight hairiness on the midrib beneath
Description
A medium to large deciduous tree growing up to 35 meters tall. It features a tall, domed crown and smooth grey bark that develops fissures with age. The black buds are a distinctive winter feature.
Key Features
Opposite pinnate leaves, distinctive black winter buds, and winged seeds (samaras) known as 'ash keys'.
Habitat
Found in temperate deciduous forests, valleys, and limestone-rich soils; prefers moist, well-drained sites
Geographic Range
Native to Europe, Asia Minor, and North Africa; widely planted in North America as an ornamental
Condition Notes
Fair to Good; some mechanical damage/tearing visible on the lower right and upper left leaflets; likely a pressed herbarium specimen.
Interesting Facts
In Norse mythology, the 'World Tree' Yggdrasil was often identified as an Ash. The wood is exceptionally strong and flexible, traditionally used for tool handles and oars.
Medicinal & Uses
Wood used for furniture and sports equipment; leaves and bark have been used in traditional medicine for fever and rheumatism.
Ecological Role
Hosts many specialized insects and provides nesting sites for birds; leaves decompose rapidly, enriching the forest floor with nutrients.
Similar Species
Fraxinus americana (White Ash) - distinguished by paler leaf undersides; Sorbus aucuparia (Rowan) - distinguished by alternate leaf arrangement.
Foraging Tips
Look for the distinctive opposite branching and black buds in spring; the 'keys' are easy to spot hanging in clusters during late summer.
Toxicity Warning
Non-toxic to humans, though some people may experience mild skin irritation from contact with the sap.