Hierarchy classification:

1. top of the aat hierarchies
2. Materials Facet
3. Materials (hierarchy name)
4. materials (substances)
5. [materials by origin]
6. biological material
7. plant material
8. [wood and wood by product]
9. wood (plant material)
10. [wood by composition or origin]
11. hardwood
12. walnut (wood)

Anotations

Scope note:

Wood of the species Juglans nigra native to the eastern and mid-western sections of North America, having a strong, durable, dark brown heartwood that finishes to a high polish. The sapwood is a pale yellow. The texture is coarse, but uniform and the grain is usually straight. Variations in color and waviness in grain are usually valued for decorative work. Black walnut is used for paneling, interior trim, furniture, cabinetry, clocks, propellers, gunstocks, sewing machines, piano cases, plywood, veneer, and decorative items.