Lonchocarpus leucanthus Burk. (Yvyra ita)
Nomenclature etc. PAPILIONACEAE. Syn.: Lonchocarpus albiflorus Hassk. Trade and local names: yvyra ita, rabo ita (PY); rabo de macaco (RA). Status of protection under CITES regulations: not protected.
Description based on: 5 specimens. Tree. Geographic distribution: southern Brazil and temperate South America.
General. Growth ring boundaries distinct. Heartwood basically brown to yellow, with streaks. Sapwood colour distinct from heartwood colour. Odour indistinct or absent. Basic specific gravity 0.9 g/cm³.
Vessels. Vessels present. Wood diffuse-porous. Vessels arranged in no specific pattern, in multiples, commonly short (2–3 vessels) radial rows or radial rows of 4 or more. Vessel outline rounded. Two distinct vessel diameter classes absent. Average tangential vessel diameter 173 µm. Average tangential diameter of vessel lumina large. Average number of vessels/mm² 1. Vessels per square millimetre very few. Perforation plates simple. Intervessel pits alternate, average diameter (vertical) 9–12 µm, large, vestured. Vessel-ray pits with distinct borders, similar to intervessel pits, of uniform size or type, of the same type in adjacent elements, located throughout the ray. Helical thickenings absent. Tyloses in vessels absent. Other deposits in heartwood vessels not observed.
Tracheids and fibres. Vascular or vasicentric tracheids sporadic to absent. Fibres of medium wall thickness. Fibre pits mainly restricted to radial walls, simple to minutely bordered. Helical thickenings absent. Fibres non-septate.
Axial parenchyma. Axial parenchyma present, banded. Axial parenchyma bands marginal (or seemingly marginal) and not marginal (or seemingly marginal), bands much wider than rays, fine, up to three cells wide to coarse, more than three cells wide. Axial parenchyma apotracheal. Paratracheal axial parenchyma aliform to confluent. Aliform parenchyma lozenge. Axial parenchyma as strands. Average number of cells per axial parenchyma strand 2–4. Unlignified parenchyma absent.
Rays. Rays present, multiseriate, also if only few, 2–4 cells wide, 2–3 cells wide to commonly 3–5 cells wide. Rays with multiseriate portions as wide as uniseriate portions absent. Aggregate rays absent. Rays of one size. Height of large rays up to 500 µm. Rays composed of a single cell type. Homocellular ray cells procumbent. Sheath cells absent. Tile cells absent. Perforated ray cells absent. Disjunctive ray parenchyma end walls indistinct or absent.
Storied structures. Storied structure present, all rays storied, axial parenchyma storied, vessel elements storied, fibres storied or not storied. Arrangement of tiers regular (horizontal or straight). Number of ray tiers per axial millimetre 3–4.
Secretory structures. Oil and mucilage cells absent. Intercellular canals absent. Laticifers or tanniniferous tubes absent.
Cambial variants. Included phloem 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. Crystal containing cells of normal size. Cystoliths absent. Silica not observed.
Cite this publication as: H. G. Richter and M. J. Dallwitz (2000 onwards). 'Commercial timbers: descriptions, illustrations, identification, and information retrieval.' In English, French, German, and Spanish. Version: 4th May 2000. http://biodiversity.uno.edu/delta/.
Dallwitz (1980) and Dallwitz, Paine and Zurcher (1993 onwards, 1995 onwards, 1998) should also be cited (see General references).