The purpose of this study is to analyse, by means of Scanning Electron Microscopy (SEM), the validity of the typification of the pollen ofCentaureaL. s.s., carried out by Wagenitz(1955) with light microscopy and based on the exine structure and sculpturing. The pollen of six species have been analyzed: one species for every type of pollen present in Italy:C. sempervirensL.,C. alpinaL.,C. scabiosaL.,C. albaL.,C. montanaL.,C. cyanusL.