Western Swamp Sheoak
Scientific name: Casuarina obesa
Overview
Western Swamp Sheoak is a medium-sized hardwood native to Western Australia, where it commonly grows along salt lakes, seasonal wetlands, and flood-prone areas. The species is highly adapted to saline environments and is valued for its ecological importance and attractive, dense timber. Although rarely harvested commercially, the wood is appreciated for specialty woodworking and represents one of Australia’s lesser-known sheoak species.
Quick Facts
- Common Name: Western Swamp Sheoak
- Scientific Name: Casuarina obesa
- Region: Oceania & Pacific Hardwoods (Australia)
- Tree Size: 20–40 ft tall, 1–2 ft trunk diameter
- Average Dried Weight: 54 lbs/ft³ (865 kg/m³)
- Janka Hardness: Approximately 1,900 lbf
- Color: Reddish brown to dark brown
- Grain: Straight to slightly interlocked
- Texture: Fine and even
Identification Characteristics
Western Swamp Sheoak produces a reddish-brown to dark brown heartwood that may deepen in color with age. The wood has a fine texture and often exhibits a subtle natural luster. Its dense structure and attractive coloration make it desirable for small specialty projects.
Key identification traits include:
- Reddish brown to dark brown coloration
- Fine and even texture
- Straight to slightly interlocked grain
- Dense and hard structure
- Often associated with saline and seasonally flooded habitats
Working Properties
Western Swamp Sheoak can be moderately difficult to work due to its density, but it machines and finishes exceptionally well when sharp tools are used.
- Moderately difficult to machine
- Turns and polishes very well
- Produces smooth finished surfaces
- Accepts oils and finishes readily
- Excellent wear resistance
Safety Note
Wood dust may cause irritation in sensitive individuals. Appropriate dust collection and respiratory protection are recommended during machining.
Common Uses
Western Swamp Sheoak is commonly used in a variety of applications, including:
- Woodturning
- Decorative objects
- Small furniture components
- Carvings
- Tool handles
- Specialty woodworking projects
- Firewood and charcoal
Sustainability & Notes
Western Swamp Sheoak is not considered threatened and plays an important ecological role in stabilizing soils and providing habitat in saline environments. Commercial timber production is extremely limited, and most wood comes from local harvests, fallen trees, or specialty suppliers.
Comparative Notes & Related Species
Swamp Sheoak – A closely related species from eastern Australia that shares similar density and ecological adaptations.
River Sheoak – Another dense Australian sheoak valued for its attractive wood and specialty woodworking uses.
Beefwood – A well-known member of the sheoak group that is similarly prized for its fine texture and reddish coloration.
Related Guides
Understanding Wood Strength: What Makes Wood Strong? – Explains how density and structure contribute to wood performance.
Best Woods for Outdoor Use – Examines wood species that perform well in demanding environmental conditions.
Building a Documented Wood Collection – Covers methods for cataloging and preserving wood samples.
Compare Wood Properties
See how this species ranks in density and hardness using our Wood Density & Janka Hardness Chart. You can also explore Hardest Woods, Softest Woods, and Most Dense Woods for quick comparisons.
Collector Notes
Western Swamp Sheoak is an excellent collector species because it represents one of Australia’s specialized salt-tolerant hardwoods. Its attractive reddish-brown wood, limited commercial availability, and unique ecological adaptations make it an interesting addition to collections focused on Australian timbers, sheoak species, and uncommon hardwoods from challenging environments.
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Do you have lumber, wood samples, tree photographs, woodworking projects, furniture, carvings, turnings, musical instruments, or other items made from this species?
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When submitting photos, please include the common name, scientific name (if known), a brief description, and any information you would like us to share with the image.
Wood Sample Collection
This species is part of an ongoing effort to document and preserve wood samples from around the world.
Learn more about contributing to the collection:
Resources
Authoritative botanical and forestry references used in compiling information about this species include:
• USDA Forest Service – Wood Handbook: Wood as an Engineering Material
https://www.fpl.fs.usda.gov/products/publications/
• The Wood Database – Global reference for wood identification, physical properties, and woodworking characteristics
https://www.wood-database.com/
• Royal Botanic Gardens, Kew – Plants of the World Online – Botanical taxonomy and species distribution database
https://powo.science.kew.org/
• International Union for Conservation of Nature (IUCN Red List) – Global conservation status assessments
https://www.iucnredlist.org/
• Convention on International Trade in Endangered Species (CITES) – International trade regulations for protected plant species
https://cites.org/
Additional forestry publications, academic research papers, and regional timber studies may also be referenced where available.
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Availability & Where to Buy
Exotic hardwood availability can vary significantly depending on region, sustainability regulations, and supplier inventory.
As this archive grows, recommended suppliers and specialty wood retailers will be listed here to help woodworkers locate responsibly sourced material.
Lumber Suppliers:
Availability varies — see the Where to Buy Exotic Woods page for current sources.
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