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Nomenclature etc. FABACEAE-MIMOSOIDEAE. Syn. Inga uruguensis Hook. & Arn. Trade and local names: ingá pytã (PY); ingá colorado (AR); ingazeiro, ingá de quatro quinas, ingá banana, pacay (BR). Not protected under CITES regulations.
Description based on 2 specimens. Tree. Geographic distribution: tropical South America, southern Brazil, temperate South America.
General. Growth ring boundaries distinct. Demarcated by a band of radially flattened fibres. Heartwood basically brown, red (ochre with a pinkish tinge according to "Celulosa Argentina 1975"); with streaks. Sapwood colour distinct from heartwood colour. Density 0.77 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 60–130–200 µm. Average number of vessels/mm² 4. Perforation plates simple. Intervessel pits alternate, average diameter (vertical) 6–8 µm, pits vestured. Vessel-ray pits with distinct borders, similar to intervessel pits. Helical thickenings absent. Other deposits present, mit braunen organischen Inhalten with brown organic contents.
Tracheids and fibres. Fibres very thin-walled to 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 (mostly crystalliferous), or 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(–4).
Rays. Rays 6–9–11 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.
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 fluorescent (yellow). Water extract not fluorescent; colour of water extract colourless to brown. Ethanol extract fluorescent (light yellow). Colour of ethanol extract colourless to brown. Froth test weakly 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’.
