Taxon

Fraxinus americana

 
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Fraxinus americana - white ash, American ash
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Common name: white ash, American ash
Family: Oleaceae
Distribution: Central & Eastern North America
IUCN Red list: Critically Endangered
Hardiness: Zone 4a -30 to -25 F
Life form: Deciduous tree
Usage: Ornamental, street tree, timber, wood products
Comments: American ash is a large broadleaf deciduous tree, with grey furrowed bark with interlacing ridges. Leaves are opposite, pinnately compound with 7-9 leaflets. Leaflets are ovate to oblong-lanceolate in shape, with small serrates at the margins, dark green above with limited pubescence on major veins below. Fall color is yellow to maroon to deep purple. Trees are dioecious with separate male and female trees, and flowers before leaves emerge. Male flowers are greenish and clustered, female flowers also greenish, developing into pendent clusters of single-winged samara fruits. American ash prefers full sun, growth is best in moist, well-drained soil. Trees in our region are threatened by the spread of the invasive emerald ash borer.
Links: OSU Landscape Plants • Trees and Shrubs Online

Locations

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