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Oregon Ash

01_Oregon Ash treeOregon Ash female twigOregon Ash leaves topOregon Ash male twigOregon Ash trunk
01_Oregon Ash treeOregon Ash female twigOregon Ash leaves topOregon Ash male twigOregon Ash trunk
01_Oregon Ash treeOregon Ash female twigOregon Ash leaves topOregon Ash male twigOregon Ash trunk

TREES

GENUS/SPECIES

Fraxinus latifolia

FAMILY

Oleaceae

SYNONYMS

Botanical: Fraxinus oregona

DISTRIBUTION

Northwestern US

  • West central Washington southward to northwestern and central California

Human Product Number - 73

Veterinary Product Number - 73

Comments

Oregon ash is a species found near streams and other moist areas. In the southern and hence drier parts of its range, its distribution is limited to sources of water. It grows from the lowlands up to a couple thousand feet in elevation and occasionally to 5000 feet. In the southern part of its range it appears to intergrade with the Arizona ash, probably due to hybridization. Oregon ash may grow to be 80 feet in height and exceed two feet in diameter. Like the other ashes, this species is dioecious, blooming in the spring. The paddle-like winged seeds ripen in the late summer. Leaves are opposite and compound, typically having from five to nine leaflets. The wood is put to relatively little use except as firewood.

States with this allergen

California
Oregon
Washington