Quebracho Serrano
Scientific name: Schinopsis marginata
Overview
Quebracho Serrano is a rare and highly durable hardwood native to the dry mountainous forests of northwestern Argentina and southern Bolivia. A member of the Anacardiaceae family, it belongs to the same genus as Red Quebracho (Schinopsis balansae), Santiago Quebracho (Schinopsis lorentzii), and Chaco Quebracho (Schinopsis heterophylla). Like its relatives, the name Quebracho derives from the Spanish phrase quiebra hacha, meaning “axe breaker,” reflecting the remarkable hardness and density of these exceptional hardwoods.
Adapted to rocky soils and seasonally dry climates, Quebracho Serrano produces an extremely dense, durable wood with excellent natural resistance to decay, insects, and weathering. Although it has never been harvested as extensively as other quebracho species, it has long been valued locally for heavy construction, fence posts, agricultural equipment, charcoal production, and tannin extraction.
Quick Facts
- Common Name: Quebracho Serrano
- Scientific Name: Schinopsis marginata
- Region: South American Hardwoods
- Tree Size: 30–60 ft (9–18 m) tall, 1–2 ft (0.3–0.6 m) trunk diameter
- Average Dried Weight: Approximately 73 lbs/ft³ (1,170 kg/m³)
- Janka Hardness: Approximately 4,300 lbf
- Grain: Interlocked to irregular
- Texture: Fine to medium
Identification Characteristics
Quebracho Serrano develops a heartwood ranging from dark reddish-brown to chocolate brown, often becoming darker with age and exposure. The sapwood is narrow and pale yellow to grayish-white, clearly separated from the heartwood. Grain is commonly interlocked or irregular, while the texture remains fine to medium. The wood possesses very little natural luster but is exceptionally dense and rich in tannins.
Key identification traits include:
- Dark reddish-brown to chocolate-brown heartwood
- Narrow pale yellow or grayish sapwood
- Interlocked to irregular grain
- Fine to medium texture
- Extremely heavy and dense
- High tannin content
- Outstanding decay resistance
Working Properties
Like the other quebracho species, Quebracho Serrano is extremely difficult to machine due to its exceptional hardness and density. Carbide tooling is strongly recommended, and cutting edges dull rapidly. Pre-drilling is necessary for screws and nails, while interlocked grain can produce tear-out during planing. Despite these challenges, the wood produces exceptionally durable finished products capable of lasting for decades in demanding outdoor environments.
- Very difficult to machine
- Rapidly dulls cutting tools
- Carbide tooling recommended
- Interlocked grain may produce tear-out
- Pre-drilling required
- Turns with difficulty
- Finishes well after proper preparation
Safety Note
Wood dust may cause skin, eye, or respiratory irritation in sensitive individuals. The wood’s naturally high tannin content may also contribute to skin sensitivity after prolonged exposure. Proper dust collection, respiratory protection, and eye protection are recommended during machining.
Common Uses
Thanks to its extraordinary hardness, exceptional durability, and outstanding resistance to decay, Quebracho Serrano is used for numerous demanding applications, including:
- Fence posts
- Heavy construction
- Bridge timbers
- Agricultural equipment
- Industrial flooring
- Timber framing
- Mining timbers
- Railroad ties
- Charcoal production
- Tannin extraction
Sustainability & Notes
Quebracho Serrano grows primarily in the mountainous regions of the southern Andes and the Sierras of northwestern Argentina, where slower growth contributes to its exceptional density. Although less heavily exploited than Red and Santiago Quebracho, habitat conversion and historical logging have reduced portions of its natural range.
Sustainable forest management and habitat conservation remain important to preserve this unique mountain-adapted hardwood and the ecosystems in which it occurs.
Comparative Notes & Related Species
Red Quebracho – A closely related species with similar density and durability but generally harvested from lower-elevation forests.
Santiago Quebracho – Another highly durable Schinopsis species widely used for heavy structural applications and tannin production.
Chaco Quebracho – A related quebracho native to the Gran Chaco region, sharing many of the same physical and mechanical properties.
Related Guides
Quebracho Species Guide – Compare the different quebracho species and learn how they differ in habitat, appearance, and woodworking characteristics.
Best Woods for Outdoor Use – Explore hardwoods that naturally resist decay, insects, and harsh weather conditions.
Understanding Wood Strength: What Makes Wood Strong? – Discover how wood anatomy, density, and grain structure contribute to exceptional strength.
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
Quebracho Serrano is an excellent collector species because it represents one of the lesser-known members of the remarkable Schinopsis genus. Although rarely encountered outside South America, it demonstrates the incredible density and durability that made the quebracho woods famous worldwide. A documented sample complements collections featuring Red Quebracho, Santiago Quebracho, and Chaco Quebracho while illustrating the diversity found within this important genus.
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Wood Sample Collection
This species is part of an ongoing effort to document and preserve wood samples from around the world.
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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
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