Hello Koen! Thanks! I love white peonies and I have several others. I study white peonies Lemoine for several years. Some of its varieties have similar features and they do not have stamens. I agree that they may appear later. And in the case of Madame Emile Lemoine they should be in the center of the crown among the many small petals. I there sought and found very small not developed stamens. Perhaps this was meant? Maybe my growing conditions are not the best. These varieties are still rare and little information.