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| Commercial timbers |
Nomenclature etc. RUTACEAE. Trade and local names: Amur cork tree, cork tree (GB); Korkbaum japanischer, mandschurischer (DE); kihada (JP); hwangbyeog-namu (KR). Not protected under CITES regulations.
Tree. Geographic distribution: temperate Asia.
General. Growth ring boundaries distinct. Heartwood basically brown; without streaks. Sapwood colour distinct from heartwood colour. Density 0.45–0.53 g/cm³.
Vessels. Vessels present. Wood ring porous. Vessels arranged in tangential bands or a diagonal and/or radial pattern (tangential to diagonal only small vessels in last formed latewood), in multiples, commonly in short (2–3 vessels) radial rows or in radial rows of 4 or more or in clusters (pore clusters only in last formed latewood). Average tangential vessel diameter 100–250 µm. Perforation plates simple. Intervessel pits alternate, average diameter (vertical) 5–8 µm. Vessel-ray pits with distinct borders, similar to intervessel pits. Helical thickenings present, only in narrow vessel elements, throughout the body of vessel elements. Tyloses absent. Other deposits present (yellowish brown).
Tracheids and fibres. Fibres very thin-walled to of medium wall thickness. Fibre pits mainly restricted to radial walls, simple to minutely bordered.
Axial parenchyma. Axial parenchyma banded. Bands marginal (or seemingly marginal). Bands fine. Tangential/diagonal rows of small latewood pores accompanied by mostly uniseriate bands, adaxially and abaxially. Axial parenchyma apotracheal, or paratracheal. Apotracheal axial parenchyma diffuse-in-aggregates. Paratracheal axial parenchyma scanty to vasicentric. Axial parenchyma as strands. Average number of cells per strand: 3–5.
Rays. Rays 3–5 per tangential mm, multiseriate, 2–5 cells wide. Height of large rays commonly 500 to 1000 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. Silica not observed.
Physical and chemical tests. Heartwood not fluorescent.
Illustrations. • Transverse section. • Tangential section. • Radial section. « this is a mounting artefact, left for the viewer's enlightenment.
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’.
