When I took pics of my Utric blooms a month or so ago, I also had my wife help me snap a pic of the internal flower parts of a U. nelumbifolia bloom (which I then forgot I had). Prior to the blooms opening, I searched all the forums for explanations & pics. While I did find a number of them, the pics were usually too small to see the details or the 'stylized' version still confused me. Combining Joseph's explanation of what to do, with his 'stylized' drawing & the following pic (showing all the parts he references) - helped me to understand how to pollinate (with some friend's hints too!).
Here's the pic: