Commercial Timbers

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H. G. Richter and M. J. Dallwitz

Dalbergia spruceana Benth. (Amazonas Palisander, Amazonas rosewood)

Nomenclature etc. FABACEAE-FABOIDEAE. Trade and local names: Amazonas Palisander (DE), Amazonas rosewood (GB, US), jacarandá do Pará, saboarana (BR). Not protected under CITES regulations.

Tree. Geographic distribution: tropical South America.

General. Heartwood basically brown to yellow red to purple, with streaks (dark brown to black). Sapwood colour distinct from heartwood colour. Density 0.85–1.11 g/cm³.

Vessels. Wood diffuse-porous. Vessels in multiples, commonly short (2–3 vessels) radial rows (rarely 4 or more). Two distinct vessel diameter classes present. Average tangential vessel diameter 115–215–390 µm. Average number of vessels/mm² 1–9. Perforation plates simple. Intervessel pits alternate, average diameter (vertical) 7–10 µm, vestured. Vessel-ray pits with distinct borders, similar to intervessel pits. Other deposits in heartwood vessels present (both amber and dark brown).

Tracheids and fibres. Fibres very thick-walled. Fibre pits mainly restricted to radial walls, simple to minutely bordered.

Axial parenchyma. Axial parenchyma banded. Axial parenchyma bands marginal (or seemingly marginal), fine, up to three cells wide. Axial parenchyma paratracheal. Apotracheal axial parenchyma diffuse and diffuse-in-aggregates. Paratracheal axial parenchyma vasicentric, aliform, and unilateral. Aliform parenchyma winged. Axial parenchyma fusiform and as strands. Average number of cells per axial parenchyma strand 2(–4).

Rays. Rays 9–12 per tangential mm, multiseriate (also if only few), (1–)2–3 cells wide. Rays composed of two or more cell types (heterocellular). Heterocellular rays with square and upright cells restricted to marginal rows, mostly 1 marginal row of upright or square cells.

Storied structures. Storied structure present, all rays storied, axial parenchyma storied, vessel elements storied, fibres storied. Number of ray tiers per axial millimetre 4, or 5.

Mineral inclusions. Crystals not observed. Silica not observed.

Physical and chemical tests. Heartwood not fluorescent. Water extract fluorescent (blue). Ethanol extract fluorescent (blue).

Illustrations. • Macro images. Dalbergia spruceana. Transverse. Radial. • Transverse section. Dalbergia spruceana. • Tangential section. Dalbergia spruceana. Note: Rays may be uniseriate or biseriate in different specimens. • Radial section. Dalbergia spruceana.


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Cite this publication as: ‘Richter, H.G., and Dallwitz, M.J. 2000 onwards. Commercial timbers: descriptions, illustrations, identification, and information retrieval. In English, French, German, Portuguese, and Spanish. Version: 25th June 2009. http://delta-intkey.com’.

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