Pollen morphology of species of Asteraceae with medicinal utility from the region of Campos Gerais, Ponta Grossa, Paraná State, Brazil

ABSTRACT We analyzed the pollen morphology of ten medicinal species of Asteraceae (Achillea millefolium L., Baccharis trimera (Less.) DC., Bidens pilosa L., Chromolaena laevigata (Lam.) R.M.King & H.Rob., Emilia sonchifolia (L.) DC., Galinsoga parviflora Cav., Matricaria chamomilla L., Senecio brasiliensis Less (Spreng.), Solidago chilensis Meyen., and Sonchus oleraceus L.) occurring in that region. The pollen grains showed common morphological characteristics such as the presence of 3(4)-colpori and lalongate endoapertures, differing in dimensions of the structures, exine structure, and aspect of the spines. The Asteraceae showed eurypalynous pattern in the region of Campos Gerais and the formed groups can be used in research requiring botanical certification by Palynology in medicinal products derived from flowers of this family.