Commercial Timbers


H. G. Richter and M. J. Dallwitz

Lagerstroemia spp. (Tabek)

Nomenclature etc. LYTHRACEAE. Lagerstroemia balansae, L. angustifolia, L. calyculata, L. cochinchinensis, L. flos-reginae, L. duppereana, L. floribunda, L. hypoleuca, L. ovalifolia, L. speciosa (Syn.: L. flos-reginae). Trade and local names: bungur (MY, ID); bang-lang (KH, VN); jarul (ID); banaba (PH); nana, bentak, bangor (ID); pyinma (MM); intanin, tabek (TH); sralao (KH). Not protected under CITES regulations.

Tree. Geographic distribution: India, Pakistan, Sri Lanka, Burma, Thailand, Laos, Vietnam, Cambodia, and Indomalesia.

General. Growth ring boundaries distinct. Heartwood basically brown (pinkish to purple brown (color of walnut)). Sapwood colour distinct from heartwood colour. Density (0.58–)0.66–0.76(–0.81) g/cm³.

Vessels. Wood ring-porous or semi-ring-porous. Vessels in multiples, commonly short (2–3 vessels) radial rows. Average tangential vessel diameter 50–100–180 µm. Perforation plates simple. Intervessel pits alternate, average diameter (vertical) 6–9 µm, vestured. Vessel-ray pits with reduced borders or apparently simple, rounded or angular or horizontal to vertical, of two distinct sizes or types in the same ray cell. Tyloses in vessels present, thinwalled.

Tracheids and fibres. Fibres of medium wall thickness. Average fibre length 900–1100–1400 µm. Fibre pits mainly restricted to radial walls, simple to minutely bordered. Fibres exclusively septate. Septate fibres evenly distributed.

Axial parenchyma. Axial parenchyma banded. Axial parenchyma bands marginal (or seemingly marginal), fine, up to three cells wide or coarse, more than three cells wide. Mostly anastomosing bands in contact with vessels. Axial parenchyma paratracheal. Paratracheal axial parenchyma aliform, or confluent. Aliform parenchyma lozenge. Axial parenchyma as strands. Average number of cells per axial parenchyma strand (3–)4(–6).

Rays. Rays 15–19–25 per tangential mm, exclusively uniseriate. Height of large rays up to 500 µm. Rays composed of a single cell type (homocellular); homocellular ray cells procumbent.

Mineral inclusions. Crystals present, prismatic, located in axial parenchyma cells. Crystal-containing axial parenchyma cells chambered. Number of crystals per cell or chamber one. Chambered crystalliferous cells (axial parenchyma) of two types: a) in long narrow chains with numerous small crystals; b) wide and short with few large crystals. Silica not observed.

Illustrations. • Transverse section. Lagerstroemia sp. • Tangential section. Lagerstroemia hypoleuca. • Radial section. Lagerstroemia hypoleuca. • Miscellaneous. Lagerstroemia hypoleuca. Note septate fibres and prismatic crystals in chambered axial 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.’.