Commercial Timbers

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H. G. Richter and M. J. Dallwitz

Cantleya corniculata (Becc.) Howard (Dedaru)

Nomenclature etc. ICACINACEAE. Trade and local names: dedaru, bedaru, samala (MY); bedaru, garu buwaja, tusam (ID). Not protected under CITES regulations.

Description based on 5 specimens. Tree. Geographic distribution: Indomalesia.

General. Growth ring boundaries indistinct or absent. Heartwood basically yellow brown, without streaks. Sapwood colour distinct from heartwood colour. Odour distinct (like an orange). Density 0.9–1.1 g/cm³.

Vessels. Wood diffuse-porous. Vessels arranged in no specific pattern, exclusively solitary. Vessel outline rounded. Two distinct vessel diameter classes absent. Average tangential vessel diameter 110–170 µm; diameter of vessel lumina: large. Average number of vessels/mm² 4–11; vessels per square millimetre few. Perforation plates simple. Intervessel pits scalariform to opposite, average diameter (vertical) 8–12 µm, medium to large, not vestured. Vessel-ray pits with distinct borders or with reduced borders or apparently simple, similar to intervessel pits or different from intervessel pits, rounded or angular, of two distinct sizes or types in the same ray cell, of the same type in adjacent elements, located throughout the ray. Helical thickenings absent. Tyloses in vessels present, thinwalled or sclerotic. Other deposits in heartwood vessels not observed.

Tracheids and fibres. Vascular or vasicentric tracheids sporadic to absent. Fibres very thick-walled. Fibre pits common in both radial and tangential walls, distinctly bordered. Helical thickenings absent. Fibres non-septate.

Axial parenchyma. Axial parenchyma present, not banded. Axial parenchyma apotracheal, or paratracheal. Apotracheal axial parenchyma diffuse. Paratracheal axial parenchyma scanty to vasicentric. Axial parenchyma as strands. Average number of cells per axial parenchyma strand 5–8. Unlignified parenchyma absent.

Rays. Rays present, 6–9 per tangential mm, multiseriate (also if only few), (1–)2–4 cells wide, narrow (2–3 seriate) or of medium width (3–5 seriate). Rays with multiseriate portions as wide as uniseriate portions absent. Aggregate rays absent. Rays of one size. Height of large rays commonly 500 to 1000 µm to commonly over 1000 µm. 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 to mostly 2–4 marginal rows of upright or square cells. Sheath cells absent. Tile cells absent. Perforated ray cells absent. Disjunctive ray parenchyma end walls distinct.

Storied structures. Storied structure absent.

Secretory structures. Oil and mucilage cells absent. Intercellular canals absent. Laticifers or tanniniferous tubes absent.

Cambial variants. Included phloem absent. Other cambial variants absent.

Mineral inclusions. Crystals not observed. Cystoliths absent. Silica not observed.

Illustrations. • Transverse section. Cantleya corniculata. • Tangential section. Cantleya orniculata. • Radial section. Cantleya corniculata. • Fibre pits. Cantleya orniculata. Large bordered fibre pits in both tangential (left) and radial (right) walls.


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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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