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Nomenclature etc. FABACEAE-MIMOSOIDEAE. Syn. Piptadenia rigida Benth. Trade and local names: angico-vermelho, angico-cedro, angico-rosa, angico-de-cortume (BR); anchico colorado, anchico, angico, curupa'y ra (AR). Not protected under CITES regulations.
Description based on 3 specimens. Tree. Geographic distribution: southern Brazil, temperate South America.
General. Growth ring boundaries distinct. Demarcated microscopically by fine marginal parenchyma bands (often with many crystals) and by tending towards 'semi-ringporous'. Heartwood basically brown, yellow, red; without streaks. Sapwood colour distinct from heartwood colour. Density 0.85 g/cm³.
Vessels. Wood diffuse porous. Vessels arranged in no specific pattern, in multiples, commonly in short (2–3 vessels) radial rows or in radial rows of 4 or more (occasionally in radial groups up to 6 vessels). Average tangential vessel diameter 60–200 µm. Average number of vessels/mm² 8–14. Perforation plates simple. Intervessel pits alternate, average diameter (vertical) 5–7 µm, pits vestured. Vessel-ray pits with distinct borders and with reduced borders or apparently simple, similar to intervessel pits or different from intervessel pits, horizontal to vertical. Helical thickenings absent. Tyloses absent. Other deposits present, with reddish brown 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 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, aliform, and confluent. Aliform parenchyma of the lozenge type. Axial parenchyma as strands. Average number of cells per strand: 2–3(–4).
Rays. Rays 6–10 per tangential mm, multiseriate, (1–)2(–3) cells wide. 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 axial parenchyma cells. Crystal-containing axial parenchyma cells chambered. Number of crystals per cell or chamber one. Silica not observed.
Physical and chemical tests. Heartwood not fluorescent. Water extract not fluorescent; colour of water extract colourless to brown. Ethanol extract fluorescent. Colour of ethanol extract red (light brick red). Froth test positive. Splinter burns to partial ash. Ash white to grey.
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’.
