Seemolf, I looked at the Wikipedia link and it seems to be the Parasolzwam (Macrolepiota procera) indeed! Today I made a new picture of this fungus. I now changed to this form: http://www.fotothing.com/senna3/photo/013e03f1e301803379031ae51f849b26/ and that is very close to the "later stadium" photos shown at Wikipedia!