Comparative Anatomy of the Woods of the Meliaceae, Sub-Family Swietenioideae

Panshin, A. J.

doi:10.2307/2436127

Cited by 7 publications

(4 citation statements)

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“…salvadorensis, C. fissilis and C. tonduzii), and two species of Swietenia (S. macrophylla and S. humilis). The wood anatomy of these species, especially C. odorata, C. fissilis and S. macrophylla, has been described by several authors (Panshin 1933, White & Gasson 2008. Four species of Meliaceae (C. salvadorensis, C.…”

Section: Resultsmentioning

confidence: 97%

Identificación de especies de árboles en peligro o amenazadas de Costa Rica basada en la anatomía de la madera y fluorescencia

Moya

Wiemann

Olivares

2013

RBT

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Identificación de especies de árboles en peligro o amenazadas de Costa Rica basada en la anatomía de la madera y fluorescencia. A total of 45 native Costa Rican tree species are threatened or in danger of extinction, but the Convention on International Trade Endangered Species (CITES) includes only eight of these in its Appendices. However, the identification of other species based on their wood anatomy is limited. The present study objective was to describe and to compare wood anatomy and fluorescence activity in some endangered or threatened species of Costa Rica. A total of 45 (22 endangered and 23 threatened with extinction) wood samples of these species, from the xylaria of the Instituto Tecnológico de Costa Rica and the Forest Products Laboratory in Madison, Wisconsin, were examined. Surface fluorescence was positive in eight species, water extract fluorescence was positive in six species and ethanol extract fluorescence was positive in 24 species. Almost all species were diffuse porous except for occasional (Cedrela odorata, C. fissilis, Cordia gerascanthus) or regular (C. salvadorensis and C. tonduzii) semi-ring porosity. A dendritic vessel arrangement was found in Sideroxylon capari, and pores were solitary in Guaiacum sanctum and Vantanea barbourii. Vessel element length was shortest in Guaiacum sanctum and longest in Humiriastrum guianensis, Minquartia guianensis and Vantanea barbourii. Finally, anatomical information and fluorescence activity were utilized to construct an identification key of species, in which fluorescence is a feature used in identification. Rev. Biol.

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Section: Resultsmentioning

confidence: 97%

Identificación de especies de árboles en peligro o amenazadas de Costa Rica basada en la anatomía de la madera y fluorescencia

Moya

Wiemann

Olivares

2013

RBT

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“…In the Neotropics (South and Central America and tropical Mexico), three commercially important species of Swietenia (Meliaceae) are listed in CITES Appendix II [ 8 ]. The wood of these three species are widely considered indistinguishable by wood anatomists [ 9 , 10 ]. Dalbergia and Pterocarpus are two other important genera of Leguminosae, often referred to as rosewood tree species [ 11 ], and most species from these genera are threatened by illegal logging activities.…”

Section: Introductionmentioning

confidence: 99%

Opening the black box: explainable deep-learning classification of wood microscopic image of endangered tree species

Zheng,

Liu,

Wang

et al. 2024

Plant Methods

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Background Traditional method of wood species identification involves the use of hand lens by wood anatomists, which is a time-consuming method that usually identifies only at the genetic level. Computer vision method can achieve "species" level identification but cannot provide an explanation on what features are used for the identification. Thus, in this study, we used computer vision methods coupled with deep learning to reveal interspecific differences between closely related tree species. Result A total of 850 images were collected from the cross and tangential sections of 15 wood species. These images were used to construct a deep-learning model to discriminate wood species, and a classification accuracy of 99.3% was obtained. The key features between species in machine identification were targeted by feature visualization methods, mainly the axial parenchyma arrangements and vessel in cross section and the wood ray in tangential section. Moreover, the degree of importance of the vessels of different tree species in the cross-section images was determined by the manual feature labeling method. The results showed that vessels play an important role in the identification of Dalbergia, Pterocarpus, Swartzia, Carapa, and Cedrela, but exhibited limited resolutions on discriminating Swietenia species. Conclusion The research results provide a computer-assisted tool for identifying endangered tree species in laboratory scenarios, which can be used to combat illegal logging and related trade and contribute to the implementation of CITES convention and the conservation of global biodiversity.

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“…Information on the occurrence of crystals in plant cells of the dicotyledons has been summarised by Solereder (1908), Kribs (1930), Metcalfe and Chalk (1950), Chattaway (1955Chattaway ( , 1956 and Carlquist (1988). Panshin (1933) and Pennington and Styles (1975) have studied Meliaceae in particular. For woods of Meliaceae from India, Pearson and Brown (1932), Anonymous (1963), Datta and Samanta (1983) and Nair (1991) have published detailed anatomical descriptions of many species of this family.…”

Section: Introductionmentioning

confidence: 99%