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H. G. Richter and M. J. Dallwitz

Nectandra lanceolata Nees (Laurel moroti)

Nomenclature etc. LAURACEAE. Syn.: Nectandra lanceolata Nees var. grandifolia Mez, Nectandra lanceolata Nees var. parvifolia Mez, Nectandra 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 and temperate South America.

General. Growth ring boundaries distinct. Growth ring boundaries demarcated by a band of thick-walled and radially flattened fibres (latewood). Heartwood basically yellow. Density 0.5–0.6 g/cm³.

Vessels. Vessels present. Wood diffuse-porous. Vessels arranged in no specific pattern, in multiples, commonly short (2–3 vessels) radial rows. Vessel outline rounded. Two distinct vessel diameter classes absent. Average tangential vessel diameter 30–95–190 µm; diameter of vessel lumina: medium. Average number of vessels/mm² 7–20; vessels per square millimetre few. Average vessel element length 250–450–750 µm. Average vessel element length medium. Perforation plates simple. Intervessel pits scalariform and alternate, average diameter (vertical) 10–13 µm, large, not vestured. 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, of the same type in adjacent elements, located throughout the ray. Helical thickenings absent. Tyloses in vessels present, thinwalled. Other deposits in heartwood vessels not observed.

Tracheids and fibres. Vascular or vasicentric tracheids sporadic to absent. Fibres very thin-walled and of medium wall thickness. Average fibre length 600–1300 µm. Average fibre length medium. Fibre pits mainly restricted to radial walls, simple to minutely bordered. Helical thickenings absent. Fibres exclusively septate. Septate fibres evenly distributed. Fibres with 2–3(-5) septae.

Axial parenchyma. Axial parenchyma present, not banded. Axial parenchyma paratracheal. Paratracheal axial parenchyma scanty and vasicentric. Axial parenchyma as strands. Average number of cells per axial parenchyma strand 4–6(–8). Unlignified parenchyma absent.

Rays. Rays present, 5–8 per tangential mm, multiseriate (also if only few), 2–3 cells wide, narrow (2–3 seriate). Rays with multiseriate portions as wide as uniseriate portions absent. Aggregate rays absent. Rays of one size. 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. Sheath cells absent. Tile cells absent. Perforated ray cells absent. Disjunctive ray parenchyma end walls indistinct or absent.

Storied structures. Storied structure absent.

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. Intercellular canals absent. Laticifers or tanniniferous tubes absent.

Cambial variants. Included phloem absent. Other cambial variants absent.

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. Cystoliths absent. Crystalline blocks in fibre lumina. Silica not observed.

Illustrations. • Transverse section. Nectandra lanceolata. • Tangential section. Nectandra lanceolata. • Radial section. Nectandra lanceolata.


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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: 25th June 2009. http://delta-intkey.com’.

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