As someone with allergies, I hate pollen. I even hate it on my car. So that I can focus my hatred, I love this picture. These are the culprits. Pictures of pollen from a variety of common plants: sunflower, morning glory, hollyhock, lily, primrose, and castor bean. The image is magnified some x500, so the bean shaped grain in the bottom left corner is about 50 μm long. Scanning Electron Microscope images have a characteristic three-dimensional appearance.