Common Name(s): Brownheart, Wacapou
Scientific Name: Vouacapoua americana
Distribution: Northeastern South America
Tree Size: 65-100 ft (20-30 m) tall, 2-3 ft (.6-1 m) trunk diameter
Average Dried Weight: 62 lbs/ft3 (925 kg/m3)
Specific Gravity (Basic, 12% MC): .78, .93
Janka Hardness: 1,880 lbf (8,370 N)
Modulus of Rupture: 21,820 lbf/in2 (150.5 MPa)
Elastic Modulus: 2,586,000 lbf/in2 (17.83 GPa)
Crushing Strength: 11,590 lbf/in2 (79.9 MPa)
Shrinkage: Radial: 4.6%, Tangential: 6.7%, Volumetric: 11.9%, T/R Ratio: 1.5
Color/Appearance: Heartwood is a medium to dark brown, sometimes with a reddish hue. Lighter brown lines (from parenchyma) mixed throughout give a contrasted appearance. Pale sapwood is clearly demarcated from heartwood.
Grain/Texture: Grain is straight to slightly irregular, with a uniform medium texture and moderate natural luster.
Endgrain: Diffuse-porous; solitary and radial multiples; large pores in no specific arrangement, few; mineral/gum deposits occasionally present; parenchyma lozenge, winged, confluent, and marginal; narrow rays, spacing normal.
Rot Resistance: Rated as very durable; good insect resistance.
Workability: Moderately difficult to work on account of its density. Tends to blunt cutters. Turns, glues, and finishes well.
Odor: No characteristic odor.
Allergies/Toxicity: Although severe reactions are quite uncommon, Brownheart has been reported to cause skin irritation. See the articles Wood Allergies and Toxicity and Wood Dust Safety for more information.
Pricing/Availability: Brownheart is only infrequently exported. It’s much more commonly used within it’s natural range for heavy exterior construction and for interior furniture. Small turning blanks are sometimes available at a moderate to high price for an imported hardwood.
Sustainability: This wood species is not listed in the CITES Appendices, but is on the IUCN Red List. It is listed as critically endangered due to a population reduction of over 80% in the past three generations, caused by a decline in its natural range, and exploitation.
Common Uses: Flooring, heavy construction, turned objects, furniture, and cabinetry.
Comments: Both strong and beautiful, Brownheart has been harvested and used for both utility and aesthetic purposes throughout its natural range. Brownheart has been formerly classified in the Andira genus, and is closely related to Partridgewood (and the wood also bears a close resemblance visually as well.)