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Anatomía de la madera de ocho especies dePentacalia(Asteraceae) en Venezuela / Wood anatomy of eight species ofPentacalia(Asteraceae) in Venezuela
Anatomía de la madera de ocho especies dePentacalia(Asteraceae) en Venezuela / Wood anatomy of eight species ofPentacalia(Asteraceae) in Venezuela
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Anatomía de la madera de ocho especies dePentacalia(Asteraceae) en Venezuela / Wood anatomy of eight species ofPentacalia(Asteraceae) in Venezuela
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Anatomía de la madera de ocho especies dePentacalia(Asteraceae) en Venezuela / Wood anatomy of eight species ofPentacalia(Asteraceae) in Venezuela
Anatomía de la madera de ocho especies dePentacalia(Asteraceae) en Venezuela / Wood anatomy of eight species ofPentacalia(Asteraceae) in Venezuela

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Anatomía de la madera de ocho especies dePentacalia(Asteraceae) en Venezuela / Wood anatomy of eight species ofPentacalia(Asteraceae) in Venezuela
Anatomía de la madera de ocho especies dePentacalia(Asteraceae) en Venezuela / Wood anatomy of eight species ofPentacalia(Asteraceae) in Venezuela
Journal Article

Anatomía de la madera de ocho especies dePentacalia(Asteraceae) en Venezuela / Wood anatomy of eight species ofPentacalia(Asteraceae) in Venezuela

2018
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Overview
La familia Asteraceae es una de las más ricas en Venezuela.Pentacaliaes el género con mayor cantidad de especies dentro de la misma y su principal área de distribución corresponde a los estados Mérida, Táchira y Trujillo. A pesar de su importancia, son pocos los estudios de anatomía xilemática paraPentacalia. El objetivo de este trabajo es la descripción anatómica de la madera de ocho especies dePentacalia:P. cachacoensis, P. greenmaniana, P. imbricatifolia, P. mason-halei, P. pachypus, P. quirorana, P. reflexayP. venezuelensiscon el fin de encontrar caracteres útiles para su identificación. Las muestras fueron colectadas en los páramos de los estados Táchira y Mérida y en selva nublada de Mérida. La preparación del material se hizo utilizando los procedimientos de microtecnia xilemática y la descripción se realizó de acuerdo a lo estipulado por la asociación internacional de anatomistas de la madera. Las especies se pueden separar en dos grupos de acuerdo a la presencia o ausencia de estructura estratificada y dentro de cada grupo se pueden establecer diferencias con base en caracteres cualitativos y, en algunos casos, es necesario separar con base en caracteres cuantitativos. SóloP. pachypusyP. venezuelensisno se pudieron separar utilizando características anatómicas de la madera. The family Asteraceae is one of the most diverse in Venezuela.Pentacaliais the genus with the highest number of species in the family and its principal distribution area is in Mérida, Táchira and Trujillo states. In spite of its importance, there are few studies about wood anatomy forPentacalia. The aim of this research was describe the wood anatomy of eight species ofPentacalia:P. cachacoensis, P. greenmaniana, P. imbricatifolia, P. mason-halei, P. pachypus, P. quirorana, P. reflexaandP. venezuelensisto find useful features for identification. Samples were collected in andean paramos of Mérida and Táchira states and cloudy forest in Mérida state. Samples were prepared using standard procedures of xylem microtechnique and description was made according international association of wood anatomists. Species studied can be separated in two groups according the presence or absence of storied structure and in each group, we found differences in qualitative features and, in some cases, is necessary the separation using quantitative features. OnlyP. pachypusandP. venezuelensiscan not be separated using wood anatomical features.
Publisher
Instituto de Ciencias Naturales, Universidad Nacional de Colombia
Subject

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