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.
Mikania; Asteraceae; cypsela; scanning electron microscopy
