Commercial Timbers


H. G. Richter and M. J. Dallwitz

Rhodognaphalon brevicuspe (Sprague) Roberty (Kondroti)

Nomenclature etc. BOMBACACEAE. Syn.: Bombax brevicuspe Sprague, B. chevalieri Pellgr. Trade and local names: kondroti (FR, CI, DE), alone (DE, GA, CG), bombax (DE), akagaouan, kouobene (CI), kuntunkun, anyinakobin (GH), kingue, zuihn (LR), bouma, boumadanga (CM), ogumalanga, koma (GA), n'demo (CG). Not protected under CITES regulations.

Tree. Geographic distribution: tropical Africa (West Africa).

General. Growth ring boundaries distinct. Heartwood basically brown to red. Sapwood colour distinct from heartwood colour. Density 0.35–0.46–0.56 g/cm³.

Vessels. Wood diffuse-porous. Vessels in multiples, commonly short (2–3 vessels) radial rows. Average tangential vessel diameter 160–295–395(–450) µm. Average number of vessels/mm² 1–5. Perforation plates simple. Intervessel pits alternate, average diameter (vertical) 9–11 µm, not vestured. Occasionally also some opposite intervessel pits. Vessel-ray pits with reduced borders or apparently simple, different from intervessel pits, horizontal to vertical, of uniform size or type, of the same type in adjacent elements. Occasionally pits of two sizes in one ray cell. Tyloses in vessels present, thinwalled.

Tracheids and fibres. Fibres of medium wall thickness. Average fibre length 1970–2685–3940 µm. Fibre pits common in both radial and tangential walls, simple to minutely bordered. Fibres non-septate.

Axial parenchyma. Axial parenchyma apotracheal and paratracheal. Apotracheal axial parenchyma diffuse-in-aggregates. Paratracheal axial parenchyma scanty. Axial parenchyma fusiform and as strands. Average number of cells per axial parenchyma strand 4–8.

Rays. Rays 6–8 per tangential mm, multiseriate (also if only few), 4–8 cells wide. 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.

Storied structures. Storied structure present, all rays storied, axial parenchyma storied, vessel elements storied, fibres storied. Number of ray tiers per axial millimetre 1.5–1.8. Highest rays extending over two stories.

Secretory structures. Intercellular canals absent.

Cambial variants. Included phloem absent.

Mineral inclusions. Crystals present, prismatic, located in axial parenchyma cells. Crystal-containing axial parenchyma cells not chambered. Number of crystals per cell or chamber one, or more than one (rarely). Silica not observed.

Illustrations. • Transverse section. Rhodognaphalon brevicuspe. • Tangential section. Rhodognaphalon brevicuspe. • Radial section. Rhodognaphalon brevicuspe.

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.’.