CITESwoodID: descriptions, illustrations, identification and information retrieval

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H. G. Richter, K. Gembruch, G. Koch

Entandrophragma utile (Dawe & Sprague) Sprague (Sipo, Utile)

Nomenclature. Family: MELIACEAE. Synonym(s): E. macrocarpa, E. roburoides, E. thomasii. Further trade and local names: assié (FR, CM); bada, mébrou, zuiri (CI); assi, ombolobolo, mouragalamando, kos-kosi (GA); efou-konkonti (GH); muyoyu (UG); timbi, assang-assié (CM); kalungi, m'vovo, tshimai rouge/noir (CD); akuk, ogipogo, ubilesan (NG); momboyo (CG); njeli (LR). Code according to DIN EN 13556: ENUT. Internal code: SIP.

CITES(EU) status of protection. Not protected.

Geographic distribution. Tropical Africa. Tropical regions of West-, Central and East Africa (Ivory Coast, Ghana, Nigeria, Cameroon, Equatorial Guinea, Gabun, Zaïre, Angola, Uganda).

Growth rings, colour, grain, etc. Growth ring boundaries distinct (demarcated by narrow marginal parenchyma bands, usually just visible to the unaided eye). Heartwood basically brown to red; without streaks. Sapwood distinct from heartwood colour (of medium width). Sapwood light greyish to pinkish brown, heartwood fairly uniform light to dark reddish brown, darkening somewhat upon exposure. Odour indistinct or absent. Wood of medium weight (0,45–0,59–0,70 g/cm3). Interlocked grain present (producing an attractive stripe or roe figure).

Hardwood vs softwood. Vessels (pores) present (= hardwood).

Vessels (pores). Wood diffuse-porous. Vessels (pores) arranged in no specific pattern; in multiples; commonly in short (2–3 vessels) radial rows. Vessels large (140–230–295 µm); very few (3–6). Tyloses absent. Other deposits in heartwood vessels (pores) present (dark reddish brown to nearly black), or absent (in case sapwood is mistaken for heartwood).

Axial parenchyma. Axial parenchyma present; banded. Parenchyma bands exclusively marginal (or seemingly marginal); narrow. Other macroscopically visible types of axial parenchyma: diffuse-in-aggregates (in short wavy bandlets between marginal bands, very distinct as compared to the somewhat blurry parenchyma in the otherwise similar Sapele).

Rays. Rays narrow (generally narrower than in the otherwise very similar Sapele). Large rays commonly less than 1 mm high.

Storied structure. Storied structure present, or absent (storied ray present in some specimens (ca. 40%), absent in others). Tiers regular (horizontal or slightly inclined), or irregular; 2 per axial millimetre.

Resin canals. Normal resin canals absent (resin canals occasionally present are of traumatic origin).

Physical and chemical tests. Heartwood not fluorescent. Water extract not fluorescent; colourless to brown, or red. Heartwood extractives not leachable by water. Ethanol extract fluorescent (weakly yellowish); colourless to brown, or red. Froth test positive (a fine ring of foam persists). Splinter burns to partial ash (under emission of heavy smoke); colour of ash white to grey.

Additional information. Informationsdienst Holz Merkblatt Nr. 1. • sip.jpg. Transverse section ca. 10x. Radial surface, natural size. Entadrophragma utile (Sipo, Utile).


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Cite this publication as: ‘Richter, H.G., Gembruch, K., and Koch, G. 2014 onwards. CITESwoodID: descriptions, illustrations, identification, and information retrieval. In English, French, German, and Spanish. Version: 16th May 2014. delta-intkey.com’.

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