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Oregon ash
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Eudicots
(unranked): Asterids
Order: Lamiales
Family: Oleaceae
Genus: Fraxinus
Species: F. latifolia
Binomial name
Fraxinus latifolia

Fraxinus latifolia (Oregon ash) is a member of the ash genus Fraxinus, native to western North America on the west side of the Cascade Range from southwestern British Columbia south through western Washington and western Oregon to central California.[1][2][3]

Leaves of the Oregon ash

It can grow to 25 meters in height, with a trunk diameter of 30-80cm. The compound leaves are pinnate, 12-33 cm long, with 5-9 leaflets, each leaflet ovate, 6-12 cm long and 3-4 cm broad, and often show signs of disease and brown rot, even on otherwise healthy plants. The fruit is a samara, 3-5 cm long including the wing.[1][2]

The Oregon ash prefers damp, loose soils, and grows from sea level to 900 meters in elevation, up to 1700 m in the south of the range in California. In central southern California, it intergrades with Fraxinus velutina (velvet ash) of southern California east into Arizona.[1][2]


  1. ^ a b c Plants of British Columbia: Fraxinus latifolia
  2. ^ a b c Jepson Flora Project: Fraxinus latifolia
  3. ^ USDA Forest Service Silvics Manual: Fraxinus latifolia


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