Commercial Timbers


H. G. Richter and M. J. Dallwitz

Paraserianthes falcataria (L.) Nielsen (Jeungjing)

Nomenclature etc. FABACEAE-MIMOSOIDEAE. Syn.: Albizia falcata, A. falcataria, A. moluccana. Trade and local names: batai, jeungjing, sengon laut, sika (ID); kayu machis (MY-sar); white albizia (PG); Moluccan sau, falcata (PH). Not protected under CITES regulations.

Tree. Geographic distribution: Thailand, Laos, Vietnam, Cambodia and Indomalesia.

General. Growth ring boundaries indistinct or absent. Heartwood basically white or grey. Sapwood colour similar to heartwood colour. Density 0.23–0.3–0.5 g/cm³. In Southeast Asia widely planted for industrial timber.

Vessels. Wood diffuse-porous. Vessels in multiples, commonly short (2–3 vessels) radial rows. Average tangential vessel diameter 160–340 µm. Average number of vessels/mm² 1–3(–4). Perforation plates simple. Intervessel pits alternate, average diameter (vertical) 5–8 µm, vestured. Vessel-ray pits with distinct borders, similar to intervessel pits. Helical thickenings absent. Tyloses in vessels absent.

Tracheids and fibres. Fibres very thin-walled. Average fibre length 1200–1500 µm. Fibre pits mainly restricted to radial walls, simple to minutely bordered. Fibres non-septate.

Axial parenchyma. Axial parenchyma not banded. Axial parenchyma apotracheal, or paratracheal. Apotracheal axial parenchyma diffuse. Paratracheal axial parenchyma scanty, or vasicentric. Axial parenchyma as strands.

Rays. Rays 6–12 per tangential mm, exclusively uniseriate or multiseriate (also if only few), 1–2 cells wide. Rays composed of a single cell type (homocellular); homocellular ray cells procumbent.

Storied structures. Storied structure absent.

Secretory structures. Intercellular canals absent.

Mineral inclusions. Crystals present, prismatic, located in axial parenchyma cells. Crystal-containing axial parenchyma cells chambered. Number of crystals per cell or chamber one. Silica not observed.

Illustrations. • Transverse section. Paraserianthes falcataria. • Tangential section. Paraserianthes falcataria. • Radial section. Paraserianthes falcataria. • Crystals in axial parenchyma. Paraserianthes falcataria. Prismatic crystals in long chains of chambered parenchyma cells.

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.’.