Tanoak
Scientific name: Notholithocarpus densiflorus
Overview
Tanoak is a distinctive hardwood native to the coastal forests of California and southern Oregon. Despite its common name, it is not a true oak but belongs to its own genus within the beech family. The species often grows alongside redwood and Douglas-fir forests in the Pacific Northwest.
The wood of Tanoak is heavy, strong, and dense, with a light brown to reddish-brown color. It resembles true oaks in appearance and mechanical properties, though it typically has a slightly finer texture.
Historically, Tanoak was widely used in the tanning industry because its bark contains high levels of tannins. The wood has also been used for flooring, furniture, and general construction, although it is less commonly harvested today compared to true oak species.
Quick Facts
- Common Name: Tanoak
- Scientific Name: Notholithocarpus densiflorus
- Region: North American Hardwoods (Western United States – California & Oregon)
- Tree Size: 60–120 ft tall, 2–4 ft trunk diameter
- Average Dried Weight: 47 lbs/ft³ (755 kg/m³)
- Janka Hardness: 1,360 lbf
- Color: Light to medium reddish brown
- Grain: Straight
- Texture: Medium to coarse
Identification Characteristics
Tanoak wood often resembles true oak species due to its similar color and density. However, it typically lacks the prominent ray fleck pattern commonly seen in white oak when quartersawn.
The wood has a moderately coarse texture with visible growth rings and generally straight grain.
Because it grows in coastal forests, boards may sometimes show irregular grain or subtle figure.
Key identification traits include:
- Light brown to reddish-brown heartwood
- Pale sapwood
- Straight to slightly irregular grain
- Medium to coarse texture
- Dense and heavy wood
Working Properties
Tanoak is considered moderately difficult to work due to its density and hardness. Sharp tools are recommended to prevent tear-out when machining.
Despite its hardness, it finishes well and can produce a smooth surface when sanded properly.
- Hard and dense wood
- Machines well with sharp tools
- Turns reasonably well
- Glues and finishes reliably
- Good wear resistance
Safety Note
Wood dust from Tanoak may cause mild respiratory irritation. Standard dust protection should be used when machining or sanding the wood.
Common Uses
Although not as widely used today as many commercial oak species, Tanoak has historically been used for a variety of woodworking applications.
Common uses include
- Flooring
- Furniture
- Cabinetry
- Tool handles
- General construction
- Tannin extraction (historically)
Sustainability & Notes
Tanoak grows throughout the coastal forests of California and Oregon and is often found mixed with redwood and Douglas-fir stands. While not heavily harvested for lumber today, the species remains relatively common in its native range.
The bark was historically an important source of tannins used in the leather tanning industry.
Comparative Notes & Related Species
White Oak – A true oak species with similar density but more prominent ray fleck patterns.
Red Oak – A common North American hardwood with similar strength and appearance.
American Chestnut – A lighter hardwood from the same beech family that was historically widespread in eastern North America.
Related Guides
How to Identify Exotic Hardwood by Grain Pattern
Learning to recognize grain patterns can help distinguish oak-like species such as Tanoak.
Moisture Content & Long-Term Stability
Understanding moisture movement helps maintain stability in dense hardwoods.
How to Store Exotic Wood Samples
Proper storage techniques help preserve wood samples for long-term identification and collection.
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
Tanoak samples are often collected because the wood resembles oak while representing a unique species from the Pacific coastal forests. Boards with distinctive color variation or unusual grain patterns are particularly interesting to wood collectors.
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.
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