Title

Ironwood (American Hop-hornbeam)

(F2166, June 2024)
File
Publication File:
Lead Author
Lead Author:
Joseph Zeleznik, Ph.D., Extension Forester
Availability
Availability:
Web only
Publication Sections

General
Scientific Name: Ostrya virginiana
Family: Betulaceae (Birch)
Hardiness: Zone 3
Leaves: Deciduous
Plant Type: Tree

Growth
Rate: Slow
Mature Height: 25-45’
Longevity: Long
Power Line: No

Ornamental
Flowers: Inconspicuous
Fruit: Tan
Fall Color: Yellow

Description

Also known as American hop-hornbeam. A medium sized, slow growing tree, found in pockets along rivers in eastern North Dakota. Leaves resemble elm but this tree is a member of the Birch family. The largest tree in North Dakota is 33 feet tall with a canopy spread of 34 feet.

Preferences

Light: Part shade to full shade.
Water: Prefers moist soils.
Soil: Prefers well drained soils, intolerant of salt.

Comments

The name ironwood refers to the strength of the wood which is often used as handles on tools.

The name American hop-hornbeam comes from the fact that the seed bearing pods somewhat resemble the fruit of hops.

The hop-hornbeam holds onto its leaves through out the winter adding a unique look to the winter landscape.