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| Commercial timbers |
Nomenclature etc. STEMONURACEAE (ICACINACEAE). Trade and local names: bedaru, samala (MY); bedaru, garu buwaja, tusam (ID). Not protected under CITES regulations.
Description based on 5 specimens. Tree. Geographic distribution: Indomalesia.
General. Heartwood basically yellow, brown. Sapwood colour distinct from heartwood colour. Odour distinct (like an orange). Density 0.9–1.1 g/cm³.
Vessels. Wood diffuse porous. Vessels exclusively solitary. Average tangential vessel diameter 110–170 µm. Average number of vessels/mm² 4–11. Perforation plates simple. Intervessel pits scalariform to opposite, average diameter (vertical) 8–12 µm. Pits observed only occasionally between overlapping vessel tails. Vessel-ray pits with distinct borders or with reduced borders or apparently simple, rounded or angular, of two distinct sizes or types in the same ray cell. Tyloses present, thinwalled or sclerotic.
Tracheids and fibres. Fibres very thick-walled. Fibre pits common in both radial and tangential walls, distinctly bordered.
Axial parenchyma. Apotracheal axial parenchyma diffuse, or diffuse-in-aggregates. Paratracheal axial parenchyma scanty to vasicentric. Axial parenchyma as strands. Average number of cells per strand: 5–8.
Rays. Rays 6–9 per tangential mm, multiseriate, (1–)2–4 cells wide. 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. Disjunctive ray parenchyma end walls distinct.
Mineral inclusions. Crystals not observed. Silica not observed.
Illustrations. • Transverse section. • Tangential section. • Radial section. • Fibre pits. large bordered fibre pits in both tangential (left) and radial (right) walls.
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: 9th April 2019. delta-intkey.com’.
