Comparación de la anatomía de la madera Quercus affinis y Q. laurina (Fagaceae)

Abstract

QUERCUS AFFINIS SCHEIDWEILER AND QUERCUS LAURINA HUMBOLDT ET BONPLAND, ARE MORPHOLOGICALLY VERY SIMILAR MAKING THEIR IDETIFICATION VERY DIFICULT. THEIR WOOD ANATOMY WAS STUDIED IN ORDER TO USE IT AS AN AID IN A MORE PRECISE IDENTIFICATION. THE ANATOMICAL QUALITATIVE AND QUANTITATIVE CHARACTERISTICS OF THE WOOD OF BOTH SPECIES WERE COMPARED, USING THE DATA OF Q, ACHERDOPHYLLA AS A STANDARD REFERENCE. THE MACROSCOPIC AND MICROSCOPIC DATA WERE COMPAREDUSING NON HIERARCHICAL STATISTICS TESTS OF DISCRIMINANT ANALISI AND BY THE TECHNIQUE OF CLUSTER AVERAGE LEAGUE (UPGMA). THE RESULTS CONFIRM THE EXISTENCE OF TWO WELL DIFFERENTIATED TAXA, Q. AFFINIS AND Q. LAURINA, AND A INTERMEDIATE GROUP THAT WE ARE CALLING Q. AFFINIS X Q. LAURINA FROM THE NEOVOLCANIC AXIS. THE ANATOMICAL TRAITS MORE USEFUL IN DELIMITING TAXA ARE POROSITY TYPE, GROWTH RINGS, SAPWOOD COLOR, GRAIN TYPE, FIBER LENGTH, VESSEL DIAMETER, AND WIDTH OF MULTISERIATE RAYS.