Abstract: The date palm (Phoenix dactylifera L.) is a very largely diodic species. The palm trees females are characterized by their fruits whereas the male feet producing pollen pose a problem of characterization. We describe an automatic approach for the distinction between four types of male palm trees. The analysis is based on the morphological characteristics of the ornamentation of the exine to be able to prepare pollen for an artificial insemination. We provide a statistical evaluation of the classification of four types of pollen.