Native to (or naturalized in) Oregon:
- Broadleaf deciduous shrub or small tree, may grow to 5-20 feet (1.5-6 m) tall; the tree form has a rounded crown and crooked trunk; bark is thin, and divided by shallow fissures into narrow, scaly ridges. Leaves opposite, usually simple, but occasionally compound with 2-3 leaflets, 4-5 cm long and 3-4 cm wide (leaflets smaller), thin but leathery, upper surface green and smooth, lower surface paler. Fruit (samara) 1.5-2.5 cm long and about 7 mm wide.
- Hardy to USDA Zone 4 Native range extends from southeastern California west to Colorado and south into Texas and northern Mexico.
- Discovered 1859 by Dr. John Newberry, surgeon-botanist, on one of the Pacific Railway Surveys.
- anomala: an anomaly, other Fraxinus have compound leaves.