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| Commercial timbers |
Nomenclature etc. FABACEAE-MIMOSOIDEAE. Syn. Piptadenia macrocarpa Benth. Trade and local names: kurupa'y (PY); angico-preto, angico, angico-preto-rajado, angico-rajado, guarapiraca (BR); cebil colorado, cebil moro, cebil (AR). Not protected under CITES regulations.
Description based on 3 specimens. Tree. Geographic distribution: tropical South America, southern Brazil, temperate South America.
General. Growth ring boundaries distinct (if distinct, demarcated by fine and often discontinuous marginal parenchyma bands (uniseriate and often crystalliferous) and a band of thick-walled fibres) or indistinct or absent. Heartwood basically brown, red, yellow; with streaks. Sapwood colour distinct from heartwood colour. Density 1.05 g/cm³.
Vessels. Vessels present. Wood diffuse porous. Vessels arranged in no specific pattern, in multiples, commonly in short (2–3 vessels) radial rows. Average tangential vessel diameter 40–110 µm. Average number of vessels/mm² 12–30. Perforation plates simple. Intervessel pits alternate, average diameter (vertical) 5–7 µm, pits vestured. Vessel-ray pits with distinct borders, similar to intervessel pits. Helical thickenings absent. Other deposits present, light brown to orange coloured organic deposits.
Tracheids and fibres. Fibres of medium wall thickness, or very thick-walled. Fibre pits mainly restricted to radial walls, simple to minutely bordered. Fibres non-septate.
Axial parenchyma. Axial parenchyma present, banded. Bands marginal (or seemingly marginal). Bands fine. Axial parenchyma apotracheal, or paratracheal. Apotracheal axial parenchyma diffuse and diffuse-in-aggregates. Paratracheal axial parenchyma vasicentric and confluent. Axial parenchyma as strands. Average number of cells per strand: 3–5. Apotracheal parenchyma often with many prismatic crystals.
Rays. Rays present, 6–8 per tangential mm, multiseriate, (1–)3–5 cells wide. Aggregate rays absent. Height of large rays up to 500 µm. Rays composed of a single cell type (homocellular); homocellular ray cells procumbent.
Storied structures. Storied structure absent.
Secretory structures. Intercellular canals absent.
Mineral inclusions. Crystals present, prismatic, located in ray cells and axial parenchyma cells. Crystal-containing ray cells procumbent, upright and/or square ray cells not chambered. Crystal-containing axial parenchyma cells chambered. Number of crystals per cell or chamber one. Silica not observed.
Physical and chemical tests. Froth test negative.
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’.
