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A micromorfologia da superfície dos frutos de 15 táxons de Mikania Willd. em microscopia eletrônica de varredura (MEV) é apresentada neste trabalho. Buscaram-se caracteres que auxiliassem a separação de espécies próximas, ocorrentes no Estado do Rio Grande do Sul. Para algumas delas, estes caracteres mostraram valor taxonômico. As espécies estudadas foram divididas em quatro grupos, de acordo com o padrão encontrado. O padrão que apresentou paredes periclinais estriadas e paredes anticlinais com projeções verrucosas foi o mais constante nas espécies de Mikania Willd. analisadas. This work presents the surface micromorphology of fruits of 15 taxa of Mikania Willd. studied under scanning electron microscopy (SEM). The aim was to find characters to separate close species that occur in Rio Grande do Sul State. Such characters had taxonomic value for some of them. The species were separated into four groups according to the pattern. The pattern with striated periclinal and anticlinal walls with verrucose projections was the most constant in the species of Mikania Willd. analyzed

Micromorfologia da superfície do fruto de espécies de Mikania Willd. (Asteraceae) ocorrentes no estado do Rio Grande do Sul, Brasil