Commercial Timbers


H. G. Richter and M. J. Dallwitz

Kalopanax pictus (Thunb.) Nakai (Sen)

Nomenclature etc. ARALIACEAE. Syn.: Kalopanax septemlobus (Thunb.) Koidz., K. ricinifolius (Thunb.) Miq., Acanthopanax ricinifolius (Sieb. & Zucc.) Seem. Trade and local names: Sen (DE, JP), sen noki, haragiri, nakoda (JP), tstsin (CN), Goldrüster, Sen Esche (DE). Not protected under CITES regulations.

Tree. Geographic distribution: temperate Asia.

General. Growth ring boundaries distinct. Heartwood basically brown to yellow to white or grey. Sapwood colour similar to heartwood colour. Density 0.5 g/cm³.

Vessels. Vessels present. Wood ring-porous. Ring of earlywood vessels uniseriate. Vessels arranged in tangential bands (wavy), in multiples, commonly short (2–3 vessels) radial rows and in clusters (latewood only). Average tangential vessel diameter 75–185–315 µm. Ring of earlywood vessels always uniseriate!. Perforation plates simple. Intervessel pits alternate, average diameter (vertical) 7–9 µm, vestured or not vestured. Vessel-ray pits with reduced borders or apparently simple, rounded or angular. Helical thickenings absent. Tyloses in vessels present, thinwalled.

Tracheids and fibres. Vascular or vasicentric tracheids commonly present. Fibres very thin-walled, or of medium wall thickness. Fibre pits mainly restricted to radial walls, simple to minutely bordered. Fibres septate and non-septate. Septate fibres evenly distributed.

Axial parenchyma. Axial parenchyma present (sparse). Axial parenchyma paratracheal. Paratracheal axial parenchyma scanty. Axial parenchyma as strands. Average number of cells per axial parenchyma strand 4–5.

Rays. Rays 5–7 per tangential mm, multiseriate (also if only few), (1–)2–6 cells wide. Height of large rays commonly 500 to 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 or mostly 2–4 marginal rows of upright or square cells (rarely).

Mineral inclusions. Crystals not observed. Silica not observed.

Illustrations. • Macro images. Transverse. Radial. Kalopanax pictus. • Transverse section. Kalopanax pictus. • Tangential section. Kalopanax pictus. • Radial section. Kalopanax pictus.

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.’.