| | Commercial timbers |
Nomenclature etc. MORACEAE. Syn.: Oldmedioperebea sclerophylla. Trade and local names: pau tanino, pau de indio, rapa dos indios (BR). Not protected under CITES regulations.
Description based on 1 specimen. Tree. Geographic distribution: tropical South America.
General. Heartwood basically brown, yellow to white or grey. Sapwood colour similar to heartwood colour. Density 0.6–0.7 g/cm³.
Vessels. Wood diffuse porous. Vessels in multiples, commonly in short (2–3 vessels) radial rows. Average tangential vessel diameter 80–160–260 µm. Average number of vessels/mm² 3–7. Perforation plates simple. Intervessel pits alternate, average diameter (vertical) 5–9 µm. Vessel-ray pits with reduced borders or apparently simple, different from intervessel pits, rounded or angular and horizontal to vertical (vertically), of two distinct sizes or types in the same ray cell, unilaterally compound and coarse. Tyloses present, thinwalled.
Tracheids and fibres. Fibres of medium wall thickness. Fibre pits mainly restricted to radial walls, simple to minutely bordered. Fibres exclusively septate; evenly distributed.
Axial parenchyma. Axial parenchyma apotracheal, or paratracheal. Apotracheal axial parenchyma diffuse-in-aggregates. Paratracheal axial parenchyma vasicentric to aliform. Aliform parenchyma of the lozenge type. Axial parenchyma as strands. Average number of cells per strand: 3–6.
Rays. Rays 4–8 per tangential mm, multiseriate, 3–6 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 and mostly 2–4 marginal rows of upright or square cells.
Secretory structures. Laticifers or tanniniferous tubes present (latex tubes in rays).
Mineral inclusions. Crystals present, prismatic, located in ray cells. Crystal-containing ray cells upright and/or square. Silica not observed.
Illustrations. • Transverse section. • Tangential section. • Radial section.
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’.
