As estruturas secretoras foliares conhecidas como coléteres são investigadas preliminarmente quanto ao seu potencial como caracteres taxonômicos para a elucidação de problemas relativos ao gênero Oxypetalum R.Br. (Asclepiadoideae, Apocynaceae) no Estado do Paraná, Brasil. ABSTRACT The leaf secretory structures known as colleters were investigated in order to test their potential use as taxonomic characters to elucidate problems related to the genus Oxypetalum R.Br. (Asclepiadoideae, Apocynaceae) in State of Paraná, Brazil. RÉSUMÉ Les structures sécrétoires de la feuille connues commecollèteres ont été recherchées pour tester leur usage potential comme caractère taxonomique pour élucider problèmes relatives au genre Oxypetalum R.Br. (Asclepiadoideae, Apocynaceae) dans L'État du Paraná, Brésil.
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