Commercial Timbers


H. G. Richter and M. J. Dallwitz

Dalbergia decipularis Matt. & Rizz. (Bahia Rosenholz, tulipwood)

Nomenclature etc. FABACEAE-FABOIDEAE. Trade and local names: Bahia Rosenholz (DE), sebastião de arruda, cego machado, pau rosa, p. cravo (BR), pinkwood (US), Brazilian tulip wood (US, GB), bois de rose (FR). Not protected under CITES regulations.

Tree. Geographic distribution: tropical South America.

General. Growth ring boundaries distinct. Heartwood basically white or grey, with streaks (red to orange). Sapwood colour distinct from heartwood colour. Odour distinct. Density 0.85–0.95–1 g/cm³.

Vessels. Wood ring-porous or semi-ring-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 50–90–210 µm. Perforation plates simple. Intervessel pits alternate, average diameter (vertical) 7–10 µm, vestured. Vessel-ray pits with distinct borders, similar to intervessel pits. Helical thickenings absent. Other deposits in heartwood vessels present (yellowish to light red).

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 apotracheal and paratracheal. Apotracheal axial parenchyma diffuse and diffuse-in-aggregates. Paratracheal axial parenchyma scanty, aliform, and unilateral. Aliform parenchyma winged (infrequent). Axial parenchyma fusiform and as strands. Average number of cells per axial parenchyma strand 2.

Rays. Rays 10–12 per tangential mm, multiseriate (also if only few), (1–)2–3 cells wide. Height of large rays up to 500 µm. Rays composed of a single cell type (homocellular) and two or more cell types (heterocellular) (very inconspicuous); homocellular ray cells procumbent. 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 5–6.

Mineral inclusions. Crystals present, prismatic, located in ray cells (infrequent). Crystal-containing ray cells upright and/or square, upright and/or square ray cells chambered. Crystal-containing axial parenchyma cells chambered. Number of crystals per cell or chamber one. Silica not observed.

Illustrations. • Transverse section. Dalbergia decipularis. • Tangential section. Dalbergia decipularis. • Radial section. Dalbergia decipularis.

The interactive key allows access to the character list, illustrations, full and partial descriptions, diagnostic descriptions, differences and similarities between taxa, lists of taxa exhibiting specified attributes, summaries of attributes within groups of taxa, and geographical distribution.

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.’.