Dryobalanops spp. (Kapur)
Nomenclature etc. DIPTEROCARPACEAE. + D. sumatrensis (J.F. Gmelin) Kosterm. (syn. D. aromatica) Gaertn.f.; D. oblongifolia Dyer; D. lanceolata Burck; D. camphora Colebr., D. junghunii Becc., D. kayanensis Becc. Trade and local names: kapur paji, -bukit, tepurau, sintok, amplang, oewa, padji (BOR), Oost-Borneo kamfer (NL), kapur, North Borneo kapur, Borneo camphorwood (GB), kapur, keladan (MAL). Status of protection under CITES regulations: not protected.
Tree. Geographic distribution: Indomalesia.
General. Heartwood basically brown to red. Sapwood colour distinct from heartwood colour. Basic specific gravity 0.58–0.8 g/cm³.
Vessels. Wood diffuse-porous. Vessels exclusively solitary. Average tangential vessel diameter 140–200–260 µm. Perforation plates simple. Intervessel pits alternate, average diameter (vertical) 5–7 µm. Vessel-ray pits with reduced borders or apparently simple, similar to intervessel pits or different from intervessel pits. Tyloses in vessels present, thinwalled. Other deposits in heartwood vessels present (brown).
Tracheids and fibres. Vascular or vasicentric tracheids commonly present. Fibres of medium wall thickness. Fibre pits common in both radial and tangential walls, distinctly bordered.
Axial parenchyma. Axial parenchyma banded. Axial parenchyma apotracheal and paratracheal. Apotracheal axial parenchyma diffuse-in-aggregates. Paratracheal axial parenchyma scanty, aliform, and confluent. Aliform parenchyma lozenge and winged. Axial parenchyma as strands. Average number of cells per axial parenchyma strand 4–6(–8).
Rays. Rays multiseriate, also if only few, 2–4 cells wide. Rays composed of two or more cell types. Heterocellular rays square and upright cells restricted to marginal rows. Number of marginal rows of upright or square cells 2–4.
Storied structures. Storied structure absent.
Secretory structures. Intercellular canals present, axial type, in long tangential lines.
Mineral inclusions. Crystals not observed. Silica present, as grains, in rays cells.
Physical and chemical tests. Water extract basically colourless to brown or shade of brown (brown). Heartwood extractives leaching out when in contact with water.
Cite this publication as: H. G. Richter and M. J. Dallwitz (2000 onwards). 'Commercial timbers: descriptions, illustrations, identification, and information retrieval.' In English, French, German, and Spanish. Version: 4th May 2000. http://biodiversity.uno.edu/delta/.
Dallwitz (1980) and Dallwitz, Paine and Zurcher (1993 onwards, 1995 onwards, 1998) should also be cited (see General references).