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| Commercial timbers |
Nomenclature etc. LAURACEAE. Nyn.: Nectandra lanceolata Nees var. grandifolia Mez, N. lanceolata Nees var. parvifolia Mez, N. lanceolata Nees var. paraguariensis Hassler. Trade and local names: laurel moroti, laurel (PY); ayuí-saiyú, canela loro, laurel canela, laurel amarillo, canela, canela de brejo (AR); canela, canela amarela, canela bosta, canela branca, louro, canela fedorenta, espora-de-galo, canela-da-várzea, canela vermelha (BR). Not protected under CITES regulations.
Description based on 6 specimens. Tree. Geographic distribution: southern Brazil, temperate South America.
General. Growth ring boundaries distinct. Demarcated by latewood with thicker-walled and radially flattened fibres. Heartwood basically brown, yellow. Sapwood colour distinct from heartwood colour. Odour indistinct or absent. Density 0.5–0.6 g/cm³.
Vessels. Wood diffuse porous. Vessels in multiples, commonly in short (2–3 vessels) radial rows. Average tangential vessel diameter 30–95–190 µm. Average number of vessels/mm² 7–20. Average vessel element length 250–450–750 µm. Perforation plates simple. Intervessel pits scalariform and alternate, average diameter (vertical) 10–13 µm. Scalariform perforation plates few, only in small vessels. Vessel-ray pits with reduced borders or apparently simple, different from intervessel pits, rounded or angular and horizontal to vertical, of two distinct sizes or types in the same ray cell. Tyloses present, thinwalled.
Tracheids and fibres. Fibres very thin-walled and of medium wall thickness. Average fibre length 600–1300 µm. Fibre pits mainly restricted to radial walls, simple to minutely bordered. Fibres exclusively septate; evenly distributed. Fibres with 2–3(-5) septae.
Axial parenchyma. Axial parenchyma apotracheal, or paratracheal. Apotracheal axial parenchyma diffuse-in-aggregates. Paratracheal axial parenchyma scanty and vasicentric. Axial parenchyma as strands. Average number of cells per strand: 4–6(–8).
Rays. Rays 5–8 per tangential mm, multiseriate, 2–3 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.
Secretory structures. Oil and mucilage cells present, associated with axial parenchyma, ray parenchyma, and fibres. Oil and mucialge cells in two different sizes: on one hand long and slender, on the other short and barrel-shaped; in transverse section they may look like axial canals.
Mineral inclusions. Crystals present, needle-like (acicular) and in other forms, located in ray cells and fibres. Crystal-containing ray cells upright and/or square and procumbent. Number of crystals per cell or chamber more than one. Crystals in one cell or chamber of the same size, or of two distinct sizes. Crystalline blocks in fibre lumina. 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’.
