Fraxinus anomala
Common name:
Singleleaf Ash
Dwarf Ash
Pronunciation:
FRAKS-i-nus a-NOMa-la
Family:
Oleaceae
Genus:
Type:
Broadleaf
Native to (or naturalized in) Oregon:
No
- 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.
- Sun
- Hardy to USDA Zone 4 Native range extends from southeastern California west to Colorado and south into Texas and northern Mexico.
- Alert: An invasive, non-native, insect pest, the Emerald Ash Borer (EAB) is present in Oregon and in much of the easthern U.S. The larvee of this pest feed on the inner bark of ash trees native to North America and Eurpoe, disrupting nutrient and water transport, which often results in tree death. For more information on this potentionally devistataing insect pest, click on Fraxinus in the Genus listing above.
- Discovered 1859 by Dr. John Newberry, surgeon-botanist, on one of the Pacific Railway Surveys.
- anomala: an anomaly, other Fraxinus have compound leaves.
Click image to enlarge
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plant habit, in habitat
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plant habit, in habitat
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leafy shoot
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leaves
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leaf
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plant habit, flowering in habitat
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flowering branches
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leaves and flower cluster
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trunk, bark
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winter twig, buds
