Anatomía de la madera de 20 especies de lianas del lote boscoso El Dorado-Tumeremo (estado Bolívar, Venezuela)

this paper presents the wood anatomy of 19 species of lianes from bolívar state, venezuela. the species studied belong to 12 families: bignoniaceae (2), caesalpiniaceae (2), combretaceae (1), dilleniaceae (2), papilionaceae (3), menispermaceae (3), moraceae (1), nyctaginaceae (1), rhamnaceae (1), sapindaceae (1), ulmaceae (1), verbenaceae. the material was prepared using conventional microtechnique. descriptions were realized according to rules of the iawa. the features found with greatest frequency were crystals (85 %), cambial variants (55 %) and two-sized vessels (50 %). the cambial variant types found were stems with furrowed xylem, concentric phloem, diffuse phloem and compound xylem cylinder. a dichotomous key for identification is presented.