Pollen morphology of some European Rosaceae

In this preliminary investigation attention was paid to pollen morphology of West-European species of the Rosaceae. Some new terms were used like fastigium, endocingulus etc. The terminology of Iversen and Troels-Smith has been followed in addition to improvements by Erdtman. A key is given to the types and subtypes for the use of pollen analytical investigators. Sanguisorba officinalis appeared to be always 3-colporate and not 6-colporate